91088955 has 20 divisors (see below), whose sum is σ = 163286112. Its totient is φ = 48580560.

The previous prime is 91088909. The next prime is 91089001. The reversal of 91088955 is 55988019.

It is an interprime number because it is at equal distance from previous prime (91088909) and next prime (91089001).

It is not a de Polignac number, because 91088955 - 2⁶ = 91088891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 91088955.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 112051 + ... + 112860.

Almost surely, 2^91088955 is an apocalyptic number.

91088955 is a deficient number, since it is larger than the sum of its proper divisors (72197157).

91088955 is a wasteful number, since it uses less digits than its factorization.

91088955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224928 (or 224919 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 91088955 is about 9544.0533841759. The cubic root of 91088955 is about 449.9406588417.

The spelling of 91088955 in words is "ninety-one million, eighty-eight thousand, nine hundred fifty-five".