15629
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 15630
- Proper Divisor Sum (Aliquot Sum)
- 1
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 15628
- Möbius Function
- -1
- Radical
- 15629
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 40
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- yes
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1822
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes of form k^2 + 4.at n=24A005473
- Next prime after n^3.at n=25A014220
- Numbers k such that 233*2^k+1 is prime.at n=24A032493
- Numerators of continued fraction convergents to sqrt(193).at n=7A041358
- a(n) = a(n-2) + a(n-3), with a(0) = 3, a(1) = 2, a(2) = 6.at n=31A046877
- Primes p such that there is no Carmichael number pqr, p<q<r q, r primes.at n=17A051663
- Smallest prime greater than 5^n.at n=6A054321
- Primes p = prime(k) such that prime(k) + prime(k+5) = prime(k+1) + prime(k+4) = prime(k+2) + prime(k+3).at n=41A064101
- Primes of the form n^2 + 4n + 8.at n=23A098062
- Triangle, read by rows, where row n equals the inverse binomial of column n of square array A100324, which lists the self-convolutions of SHIFT(A003169).at n=50A100326
- Smallest prime >= 5^n.at n=6A104083
- Prime Friedman numbers.at n=6A112419
- Smaller of two consecutive Sophie Germain primes with the same digital sum.at n=37A118506
- Primes for which the weight as defined in A117078 is 23.at n=34A119504
- Primes of the form a^a + b^b + c^c + d^d + e^e + f^f.at n=24A136294
- Primes of the form 2*3*5*7*k+89, k >= 0.at n=33A141866
- Primes congruent to 25 mod 47.at n=35A142376
- Primes congruent to 47 mod 53.at n=37A142577
- Primes congruent to 9 mod 55.at n=40A142608
- Primes congruent to 53 mod 59.at n=30A142780