91499969 has 4 divisors (see below), whose sum is σ = 99818160. Its totient is φ = 83181780.

The previous prime is 91499951. The next prime is 91499981. The reversal of 91499969 is 96999419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 91499969 - 2⁸ = 91499713 is a prime.

It is a super-2 number, since 2×91499969² = 16744488654001922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91499909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4159079 + ... + 4159100.

It is an arithmetic number, because the mean of its divisors is an integer number (24954540).

Almost surely, 2^91499969 is an apocalyptic number.

It is an amenable number.

91499969 is a deficient number, since it is larger than the sum of its proper divisors (8318191).

91499969 is a wasteful number, since it uses less digits than its factorization.

91499969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8318190.

The product of its digits is 1417176, while the sum is 56.

The square root of 91499969 is about 9565.5616144584. The cubic root of 91499969 is about 450.6163882375.

The spelling of 91499969 in words is "ninety-one million, four hundred ninety-nine thousand, nine hundred sixty-nine".