Properties of the Number 61690

Sixty-One Thousand Six Hundred Ninety

Basics

Value: 61689 → 61690 → 61691

Parity: even

Prime: No

Previous Prime: 61687

Next Prime: 61703

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 5 × 31 × 199

Divisors: 1, 2, 5, 10, 31, 62, 155, 199, 310, 398

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 1111000011111010

Octal: 170372

Duodecimal: 2B84A

Hexadecimal: f0fa

Square: 3805656100

Square Root: 248.37471690975312

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

Set partitions up to rotations. A84423

Indices k such that the (k+1)-st partial sum of primes divided by k is an integer. A134126

a(n) = p*(p - 1)*(13·p - 5)/6, where p = prime(n). A273221

Number of compositions of n into distinct parts with exactly ten descents. A241729

Array read by antidiagonals: T(n,k) is the number of color patterns (set partitions) in an oriented cycle of length n using k or fewer colors (subsets). A320747

Generalized Stirling numbers. A61690