91252089 has 12 divisors (see below), whose sum is σ = 136690736. Its totient is φ = 60834564.

The previous prime is 91252087. The next prime is 91252123. The reversal of 91252089 is 98025219.

It is not a de Polignac number, because 91252089 - 2¹ = 91252087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91252087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 187519 + ... + 188004.

Almost surely, 2^91252089 is an apocalyptic number.

It is an amenable number.

91252089 is a deficient number, since it is larger than the sum of its proper divisors (45438647).

91252089 is an equidigital number, since it uses as much as digits as its factorization.

91252089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375538 (or 375526 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 91252089 is about 9552.5959299030. The cubic root of 91252089 is about 450.2091028205.

The spelling of 91252089 in words is "ninety-one million, two hundred fifty-two thousand, eighty-nine".