Properties of the Number 99681

Ninety-Nine Thousand Six Hundred Eighty-One

Basics

Value: 99680 → 99681 → 99682

Parity: odd

Prime: No

Previous Prime: 99679

Next Prime: 99689

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 3 × 149 × 223

Divisors: 1, 3, 149, 223, 447, 669, 33227, 99681

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11000010101100001

Octal: 302541

Duodecimal: 49829

Hexadecimal: 18561

Square: 9936301761

Square Root: 315.722979841506

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

Largest n-digit triangular number. A95864

Triangular numbers which are sums of three consecutive primes. A167788

Largest squarefree triangular number < 10ⁿ. A226382

Triangular numbers T(i) that can be expressed as the sum of 2 positive triangular numbers, T(j)+T(k), and for which i+j+k is a triangular number, where T is A000217. A343426

Triangular numbers (A000217) with arithmetic derivative (A003415) a palindrome (A002113). A353217

a(n) is the largest n-digit palindrome that is the product of two numbers having an equal number of digits, or 0 if no such palindrome exists. A308803

Consider the family of multigraphs enriched by the species of ternary sets. Sequence gives number of those multigraphs with 3n loops and edges. A99681