Properties of the Number 99978

Ninety-Nine Thousand Nine Hundred Seventy-Eight

Basics

Value: 99977 → 99978 → 99979

Parity: even

Prime: No

Previous Prime: 99971

Next Prime: 99989

Digit Sum: 42

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 19 × 877

Divisors: 1, 2, 3, 6, 19, 38, 57, 114, 877, 1754

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11000011010001010

Octal: 303212

Duodecimal: 49A36

Hexadecimal: 1868a

Square: 9995600484

Square Root: 316.1929790491876

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

Numbers that require exactly 8 iterations to determine that they are happy or not (A007770 and A031177). A193996

Number of 3 X n arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..1 3 X n array. A219774

a(n) is n in binary rendered as a base-10 number minus n in ternary rendered as a base-10 number. A347111

Successive maxima of log(n#)/n where n# is the product of the primes less than n. A108310

Bisection of A001157: a(n) = sigma₂(2n-1). A99978