Properties of the Number 87724

Eighty-Seven Thousand Seven Hundred Twenty-Four

Basics

Value: 87723 → 87724 → 87725

Parity: even

Prime: No

Previous Prime: 87721

Next Prime: 87739

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 7 × 13 × 241

Divisors: 1, 2, 4, 7, 13, 14, 26, 28, 52, 91

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10101011010101100

Octal: 253254

Duodecimal: 42924

Hexadecimal: 156ac

Square: 7695500176

Square Root: 296.18237624814884

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

a(n) = ChebyshevT(3, n). A144129

Numbers k such that k | sigma₈(k). A55712

Numerators of continued fraction convergents to sqrt(87). A41154

Numerators of continued fraction convergents to sqrt(783). A42510

Numerator of best rational approximation x/y of sqrt(k), y<=k, with k given by A306972. The corresponding denominators are given in A306974. A306973

Number of interior balls in a truncated tetrahedral arrangement. A92966

a(n) = -PrimePi(n) +floor( prime(n)/log(n))-2. A87724