Properties of the Number 13987

Thirteen Thousand Nine Hundred Eighty-Seven

Basics

Value: 13986 → 13987 → 13988

Parity: odd

Prime: No

Previous Prime: 13967

Next Prime: 13997

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 71 × 197

Divisors: 1, 71, 197, 13987

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11011010100011

Octal: 33243

Duodecimal: 8117

Hexadecimal: 36a3

Square: 195636169

Square Root: 118.26664787673657

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

Number of odd-length integer partitions of n with integer alternating product. A347444

Centered 21-gonal numbers. A69178

Strings of 5 digits from 1...9, such that no formula using the single digits in the given order exists that evaluates to 0. A288355

Number of partitions p of n such that neither floor(mean(p)) nor ceiling(mean(p)) is a part. A241343

a(n) is the number of free polyominoes of width 2 and size n. A352720

Triangle read by rows: T(n,k) = number of collections of up to k subsets of [n] covering [n], with [0]={}; n>=0, k=0..2ⁿ. A381683

Number of ternary rooted trees with n nodes and height at most 6. A36374

Number of connected undirected unlabeled loopless multigraphs with 4 vertices and n edges. A290778

a(n) = ∑_d∣n (pod(d)/d), where pod(k) is the product of the divisors of k (A007955). A322671

Squarefree MM-numbers of strict uniform regular multiset systems spanning an initial interval of positive integers. A322703