Properties of the Number 61930

Sixty-One Thousand Nine Hundred Thirty

Basics

Value: 61929 → 61930 → 61931

Parity: even

Prime: No

Previous Prime: 61927

Next Prime: 61933

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 11 × 563

Divisors: 1, 2, 5, 10, 11, 22, 55, 110, 563, 1126

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111000111101010

Octal: 170752

Duodecimal: 2BA0A

Hexadecimal: f1ea

Square: 3835324900

Square Root: 248.85738887965533

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

Numbers that define integer Heronian triangles [prime(a(n)), prime(a(n)+1), A068965(n)] with area A068966(n). A68964

Related to Fibonacci numbers, see the Formula section. A215082

Number of 4-indecomposable (connected) graphs on n nodes. A128526

a(n) = A215082(2·n). A215108

a(n) = a(n-2) + a(n-3) + a(n-4) with a(0) = 0, a(1) = a(2) = 1, a(3) = 0. A277252

Concatenation of sum n+(n+1) and product n*(n+1) in decimal. A337148

G.f. A(x) satisfies: [xⁿ] A(x)ⁿ⁺¹ = [xⁿ] (1 + x·A(x)^n-1)ⁿ⁺¹ for n >= 0. A360231

Square array read by antidiagonals of T(n,k)=T(n-1,[k/2])+T(n-1,[k/3]) with T(0,0)=1. A61930

Triangle T(n, k) = ∑_m=0..k ∑_j=0..m Multinomial(n-k-m-j, j, m, k), read by rows. A141724

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