Properties of the Number 91378

Ninety-One Thousand Three Hundred Seventy-Eight

Basics

Value: 91377 → 91378 → 91379

Parity: even

Prime: No

Previous Prime: 91373

Next Prime: 91381

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 7 × 61 × 107

Divisors: 1, 2, 7, 14, 61, 107, 122, 214, 427, 749

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10110010011110010

Octal: 262362

Duodecimal: 44A6A

Hexadecimal: 164f2

Square: 8349938884

Square Root: 302.2879422008096

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 first of three consecutive triangular numbers the sum of which is equal to the sum of three consecutive primes. A298168

Triangular numbers representable as x·y+x+y such that·and y are triangular numbers, x>=y>1. A259746

Number of integer compositions of n with weighted alternating sum 0. A363626

Triangular numbers representable as x·y+x+y such that·and y are triangular numbers, x>=y>0. A259745

a(1) = 7; a(n+1) = smallest triangular number > a(n) formed by adding at least one digit to a(n). A68621

Triangular numbers with sum of digits = 28. A68132

Triangular numbers such that both the number formed by the first floor((k+1)/2) digits and the remaining part (if any) are triangular numbers, where k is the number of digits. A68821

Triangular number·such that x + reverse of·is a prime. A72387

Numbers k > 1 for which floor(b(k)) = floor(b(k-1)), where b(m) = ∑_j=1..m (j/(j+2)). A133470

Number of triples (i,j,k) such that i+j+k > 0 with -n <= i,j,k <= n. A302302