Properties of the Number 387

Three Hundred Eighty-Seven

Basics

Value: 386 → 387 → 388

Parity: odd

Prime: No

Previous Prime: 383

Next Prime: 389

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 43

Divisors: 1, 3, 9, 43, 129, 387

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110000011

Octal: 603

Duodecimal: 283

Hexadecimal: 183

Square: 149769

Square Root: 19.672315572906

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

Binary palindromes: numbers whose binary expansion is palindromic. A6995

Multiples of 9: a(n) = 9·n. A8591

Numbers which are the product of a prime and the square of a different prime (p² * q). A54753

Numbers k such that k and k+1 have the same number of divisors. A5237

Indices k such that (1/3)*(prime(k)+prime(k+1)+prime(k+2)) is a prime. A64113

Number of graphical partitions of 2n. A569

Flavius Josephus's sieve: Start with the natural numbers; at the k-th sieving step, remove every (k+1)-st term of the sequence remaining after the (k-1)-st sieving step; iterate. A960

The "comma sequence": the lexicographically earliest sequence of positive numbers with the property that the sequence formed by the pairs of digits adjacent to the commas between the terms is the same as the sequence of successive differences between the terms. A121805

Lesser of two consecutive numbers each divisible by a square. A68781

Number of partitions of n into at most 1 copy of 1, 2 copies of 2, 3 copies of 3, ... . A52335