Properties of the Number 86722

Eighty-Six Thousand Seven Hundred Twenty-Two

Basics

Value: 86721 → 86722 → 86723

Parity: even

Prime: No

Previous Prime: 86719

Next Prime: 86729

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 131 × 331

Divisors: 1, 2, 131, 262, 331, 662, 43361, 86722

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101001011000010

Octal: 251302

Duodecimal: 4222A

Hexadecimal: 152c2

Square: 7520705284

Square Root: 294.48599287572233

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

Subtract 1 from each term of A004094 (the powers of 2 written backwards). A341718

G.f. satisfies: A(x) = x²/(1-x) + A(A(x)). A213906

Let P(m,k) = 1-(m-1)*...*(m-k+1)/m^k-1 be the probability that at least two out of k people share a birthday out of m possible days. Sequence gives values of m for which P(m,k(m)) sets a new minimum, where k(m) is the smallest k such that P(m,k) > 1/2. A392222

Decimal expansion of g(1)+g(2)-g(4)-g(5), where g(k) = ∑_m>=0 (1/(6·m+k)²). A86722