Properties of the Number -7643

Six Hundred Forty-Three

Basics

Value: -7644 → -7643 → -7642

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 7643

Divisors: 1, 7643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1110111011011

Octal: -16733

Duodecimal: -450B

Hexadecimal: -1ddb

Square: 58415449

Square Root: 87.42425292789181

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 rooted trees with n nodes in which all positive outdegrees are the same. A298422

Safe primes which are also Sophie Germain primes. A59455

Balanced primes of order three. A82078

Number of ordered positive integer solutions (m₁, m₂, ..., m_k) (for some k) to ∑_i=1..k m_i=n with |m_i-m_i-1| <= 1 for i = 2 ... k. A34297

Number of non-isomorphic n-element sets of singletons or pairs of elements of {1..n} with union {1..n}, or unlabeled loop-graphs with n edges covering n vertices. A368599

a(0) = 2; a(n) for n > 0 is the smallest prime greater than a(n-1) that differs from a(n-1) by a square. A73609

Primes with distinct digits in descending order. A52014

Father primes of order 6. A136075

Primes p such that 2·p+1 and 2·p+3 are twin primes. A126107

Primes that remain prime when a single "2" digit is inserted between any two adjacent decimal digits. A217044