Properties of the Number -391189

Three Hundred Ninety-One Thousand One Hundred Eighty-Nine

Basics

Value: -391190 → -391189 → -391188

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 31 × 12619

Divisors: 1, 31, 12619, 391189

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

375 Try Today's Challenge

Representations

Binary: -1011111100000010101

Octal: -1374025

Duodecimal: -16A471

Hexadecimal: -5f815

Square: 153028833721

Square Root: 625.4510372523176

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

G.f. A(x) satisfies: [x^k] A(x) / (1-x)ⁿ = 0 for k = n*(n+1)/2 + 1 through k = (n+1)*(n+2)/2 for n >= 0. A305605

Matrix inverse of triangle A122175, where A122175(n,k) = C( k*(k+1)/2 + n-k, n-k) for n>=k>=0. A121435

Triangular matrix T, read by rows, that satisfies: [T^k](n,k) = T(n,k-1) for n>=k>0, or, equivalently, (column k of T^k) = SHIFT_LEFT(column k-1 of T) when zeros above the diagonal are ignored. A107876

Column 1 of triangle A107876. A107877

Number of integer compositions of n where adjacent parts are indivisible (either way) and the last and first part are also indivisible (either way). A318727

Matrix square of triangle A107876; equals matrix product of triangles: A107876² = A107862^-1·A107870 = A107867^-1·A107873. A107880

Matrix inverse of triangle A098568, where A098568(n, k) = C( (k+1)*(k+2)/2 + n-k-1, n-k) for n>=k>=0. A121434