Properties of the Number 17989

Seventeen Thousand Nine Hundred Eighty-Nine

Basics

Value: 17988 → 17989 → 17990

Parity: odd

Prime: Yes

Previous Prime: 17987

Next Prime: 18013

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 17989

Divisors: 1, 17989

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 100011001000101

Octal: 43105

Duodecimal: A4B1

Hexadecimal: 4645

Square: 323604121

Square Root: 134.12307780542466

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) is the largest prime < 10·a(n-1) for n > 1, with a(1) = 2. A124262

Smallest prime with digit sum n, or 0 if no such prime exists. A67180

Primes p such that q-p = 24, where q is the next prime after p. A98974

Starting index of a string of exactly 4 consecutive equal digits in decimal expansion of π. A49520

Primes that remain prime through 3 iterations of function f(x) = 2x + 5. A23274

Starting index of a string of 4 or more consecutive equal digits in decimal expansion of π. A49516

The smallest prime with a possible given digit sum. A67523

Smallest prime whose digital sum is equal to the n-th composite number, or 0 if no such prime exists. A73867

Numbers n such that Q(sqrt(n)) has class number 9. A218041

Primes p such that p - 2 and p³ - 2 are also prime. A240126