Properties of the Number 68985

Sixty-Eight Thousand Nine Hundred Eighty-Five

Basics

Value: 68984 → 68985 → 68986

Parity: odd

Prime: No

Previous Prime: 68963

Next Prime: 68993

Digit Sum: 36

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 7 × 73

Divisors: 1, 3, 5, 7, 9, 15, 21, 27, 35, 45

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000110101111001

Octal: 206571

Duodecimal: 33B09

Hexadecimal: 10d79

Square: 4758930225

Square Root: 262.64995716732943

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

RMS numbers: numbers n such that root mean square of divisors of n is an integer. A140480

Analog of A097717 in base 4. A249598

Numbers m such that the arithmetic mean and the quadratic mean (the root mean square) of the divisors of m are both integers. A327055

For any n >= 0 and k > 0, the prime(k)-adic valuation of a(n) equals the prime(k)-adic valuation of n + k (where prime(k) denotes the k-th prime). A298155

Composite RMS numbers: composite numbers c such that root mean square of divisors of c is an integer. A158287

Smallest multiple of n whose sum of digits is greater than n. A269332

Decimal expansion of 1/e. A68985

Numbers n for which each of the digits 0-9 appears exactly once as first digit in the orbit of n under iterations of n -> (first digit of n)*(n with first digit removed) until a single digit is reached; no leading zeros allowed. A257299

Number of (4+1)X(n+1) 0..2 arrays with every element next to itself plus and minus one within the range 0..2 horizontally or antidiagonally, with no adjacent elements equal. A232593