Properties of the Number 61909

Sixty-One Thousand Nine Hundred Nine

Basics

Value: 61908 → 61909 → 61910

Parity: odd

Prime: Yes

Previous Prime: 61879

Next Prime: 61927

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 61909

Divisors: 1, 61909

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1111000111010101

Octal: 170725

Duodecimal: 2B9B1

Hexadecimal: f1d5

Square: 3832724281

Square Root: 248.81519246219673

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

A(n,k) is the sum of all compositions [c₁, c₂, ..., c_k] of n into k nonnegative parts encoded as ∏_i=1..k prime(i)^c_i; square array A(n,k), n>=0, k>=0, read by antidiagonals. A343751

Triangle read by rows: T(n,k) = p(k)*T(n-1,k) + T(n-1,k-1) (1 <= k <= n), where p(k) denotes the k-th prime. A124960

Lexicographically largest increasing sequence of primes for which the continued square root map (see A257574) produces the decimal expansion of e (Euler's number). A257764

Expansion of g.f. 1/((1-2x)(1-3x)(1-5x)). A16273

Primes that are the sum of some first primes minus one. A388261

Skinny numbers: numbers n such that there are no carries when n is squared by "long multiplication". A61909