11351
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 11352
- 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
- 11350
- Möbius Function
- -1
- Radical
- 11351
- 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
- 130
- 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
- yes
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1371
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Primes of the form k^2 + k + 9.at n=13A027758
- Lesser of irregular twin primes.at n=35A060012
- First prime after phi(prime(n)^2).at n=27A079477
- Lower twin primes with lower twin prime index.at n=15A088460
- a(n) = lesser of a pair of twin primes p, q=p+2 such that product of first n primes plus p is a prime and also product of first n primes plus q is a prime.at n=36A090795
- Balanced primes of order twelve.at n=7A096704
- Upper prime of a difference of 22 between consecutive primes.at n=20A098976
- Primes arising in A032682.at n=41A099677
- Primes p such that p+2, p^2 - 2p + 2, and p^2 - 2p + 4 are all prime.at n=9A101315
- a(n) = 6*n*(n-1) - 1.at n=44A103115
- Numbers k such that A109631(k) - A109631(k+1) = A109631(k+2).at n=12A109715
- Lesser of a twin-prime pair where both are expressible as the sum of two triangular numbers.at n=23A118638
- a(n) = 15*n*(n+1) + 11.at n=27A132208
- a(n) is the least prime for which the n-th term of the sequence S(a(n)) belongs to A007500, where each term of S(p) is the least prime >= the reversal of the previous term.at n=9A135436
- Father primes of order 5.at n=38A136074
- Lesser of twin primes isolated from neighboring primes by +- 10 (or more).at n=21A138063
- Primes of the form 210n+11.at n=26A140840
- Primes congruent to 29 mod 37.at n=41A142138
- Primes congruent to 35 mod 41.at n=31A142232
- Primes congruent to 42 mod 43.at n=31A142291