Properties of the Number 61389

Sixty-One Thousand Three Hundred Eighty-Nine

Basics

Value: 61388 → 61389 → 61390

Parity: odd

Prime: No

Previous Prime: 61381

Next Prime: 61403

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 19 × 359

Divisors: 1, 3, 9, 19, 57, 171, 359, 1077, 3231, 6821

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110111111001101

Octal: 167715

Duodecimal: 2B639

Hexadecimal: efcd

Square: 3768609321

Square Root: 247.76803667947163

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

Triangle, read by rows, where the n-th row is the first n terms of the n-th self-convolution of the sequence formed by flattening this triangle. A86606

Main diagonal of triangle A086606: the n-th term of the n-th self-convolution of the sequence formed by flattening triangle A086606. A86607

Values of the argument at successive record minima of the function R defined as follows. For any integer x >= 1, let y > x be the smallest integer such that there exist integers x < c < d < y such that x³ + y³ = c³ + d³. Then R(x) = y/x. A360427

Number of asymmetric (identity) trees with n nodes and 6 leaves. A55337

Number of (1+φ)-divisors of n. A61389