Properties of the Number -9999991

Nine Hundred Ninety-Nine Thousand Nine Hundred Ninety-One

Basics

Value: -9999992 → -9999991 → -9999990

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 55

Digital Root: 1

Palindrome: No

Factorization: 9999991

Divisors: 1, 9999991

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100110001001011001110111

Octal: -46113167

Duodecimal: -3423047

Hexadecimal: -989677

Square: 99999820000081

Square Root: 3162.276237143112

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 prime. A3618

Smallest prime beginning with exactly n 9's. A65592

a(n) = largest member of the n-th term in S(10) (defined in Comments). A158579

Primes of the form 90·R_k + 1, where R_k is the repunit (A002275) of length k. A93177

Greatest n-digit prime having at least n-1 identical digits. A241206

Near-repdigit primes with at least two 9's as the repeated digit, and ending in a distinct digit. A365598

Primes of the form identical odd digits followed by a 1. A89346

Largest prime <= square root of 10ⁿ. A132153

a(n) = 10ⁿ - 9. A170955

Smallest prime whose product of digits is 3ⁿ. A88653