91089265 has 16 divisors (see below), whose sum is σ = 112464000. Its totient is φ = 70785792.

The previous prime is 91089221. The next prime is 91089277. The reversal of 91089265 is 56298019.

It is a cyclic number.

It is not a de Polignac number, because 91089265 - 2⁷ = 91089137 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41721 + ... + 43849.

It is an arithmetic number, because the mean of its divisors is an integer number (7029000).

Almost surely, 2^91089265 is an apocalyptic number.

It is an amenable number.

91089265 is a deficient number, since it is larger than the sum of its proper divisors (21374735).

91089265 is a wasteful number, since it uses less digits than its factorization.

91089265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2376.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 91089265 is about 9544.0696246413. The cubic root of 91089265 is about 449.9411692638.

The spelling of 91089265 in words is "ninety-one million, eighty-nine thousand, two hundred sixty-five".