Properties of the Number 73

Seventy-Three

Basics

Value: 72 → 73 → 74

Parity: odd

Prime: Yes

Previous Prime: 71

Next Prime: 79

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 73

Divisors: 1, 73

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1001001

Octal: 111

Duodecimal: 61

Hexadecimal: 49

Square: 5329

Square Root: 8.54400374531753

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

The prime numbers. A40

The positive integers. Also called the natural numbers, the whole numbers or the counting numbers, but these terms are ambiguous. A27

Squarefree numbers: numbers that are not divisible by a square greater than 1. A5117

The odd numbers: a(n) = 2·n + 1. A5408

Gpf(n): greatest prime dividing n, for n >= 2; a(1)=1. A6530

Largest squarefree number dividing n: the squarefree kernel of n, rad(n), radical of n. A7947

Powers of primes. Alternatively, 1 and the prime powers (p^k, p prime, k >= 1). A961

Lpf(n): least prime dividing n (when n > 1); a(1) = 1. Or, smallest prime factor of n, or smallest prime divisor of n. A20639

The nonnegative integers. A1477

Remove all factors of 2 from n; or largest odd divisor of n; or odd part of n. A265

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