697
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 22
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 5
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 756
- Proper Divisor Sum (Aliquot Sum)
- 59
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 640
- Möbius Function
- 1
- Radical
- 697
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 126
- Smith Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Names
- German
- sechshundertsiebenundneunzig· ordinal: sechshundertsiebenundneunzigste
- English
- six hundred ninety-seven· ordinal: six hundred ninety-seventh
- Spanish
- seiscientos noventa y siete· ordinal: 697º
- French
- six cent quatre-vingt-dix-sept· ordinal: six cent quatre-vingt-dix-septième
- Italian
- seicentonovantasette· ordinal: 697º
- Latin
- sescenti nonaginta septem· ordinal: 697.
- Portuguese
- seiscentos e noventa e sete· ordinal: 697º
Appears in sequences
- Cake numbers: maximal number of pieces resulting from n planar cuts through a cube (or cake): C(n+1,3) + n + 1.at n=16A000125
- Heptagonal numbers (or 7-gonal numbers): n*(5*n-3)/2.at n=17A000566
- Numbers k such that (k^2 + k + 1)/21 is prime.at n=33A002644
- The square sieve.at n=46A002960
- Divisors of 2^40 - 1.at n=29A003546
- Numbers divisible only by primes congruent to 1 mod 8.at n=30A004625
- a(n) = round(n*phi^7), where phi is the golden ratio, A001622.at n=24A004942
- a(n) = ceiling(n*phi^7), where phi is the golden ratio, A001622.at n=24A004962
- Numbers k such that k, k+1 and k+2 have the same number of divisors.at n=17A005238
- Number of fractions in Farey series of order n.at n=47A005728
- Numbers n such that n! has a square number of digits.at n=21A006488
- Discriminants of totally real cubic fields.at n=15A006832
- a(n) = (5*n + 1)^2 + 4*n + 1.at n=5A007533
- Hyperperfect numbers: k = m*(sigma(k) - k - 1) + 1 for some m > 1.at n=3A007592
- Numbers that are the sum of 2 nonzero squares in 2 or more ways.at n=47A007692
- Coordination sequence T7 for Zeolite Code MEL.at n=17A008156
- Composite but smallest prime factor >= 17.at n=12A008367
- Multiples of 17.at n=41A008599
- Numbers k such that the continued fraction for sqrt(k) has period 3.at n=5A013643
- Numbers of form |2^i - 3^j|.at n=57A014121