Properties of the Number 2391

Two Thousand Three Hundred Ninety-One

Basics

Value: 2390 → 2391 → 2392

Parity: odd

Prime: No

Previous Prime: 2389

Next Prime: 2393

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 797

Divisors: 1, 3, 797, 2391

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100101010111

Octal: 4527

Duodecimal: 1473

Hexadecimal: 957

Square: 5716881

Square Root: 48.8978527135906

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

Partial sums of A299291. A299292

Convolution of primes with themselves. A14342

Number of partitions satisfying 0 < cn(0,5) + cn(1,5) + cn(4,5). A39900

a(n) = prime(n)*prime(n+1) - prime(n) - prime(n+1). A37165

Numbers whose binary expansion generates rotationally symmetric XOR-triangles. A334556

a(n) is the number of n-tosses having a run of 3 or more heads for a fair coin (i.e., probability is a(n)/2ⁿ). A50231

Numbers k such that the digits of σ(k) are a permutation of those of k, in base 10. A115920

Expansion of 1/(1 - x² - x³ - x⁴) = 1/((1 + x)*(1 - x - x³)). A13979

Numbers m that generate rotationally symmetrical XOR-triangles T(m) that have central triangles of zeros. A334769

Square spiral of sums of selected preceding terms, starting at 1. A141481