91090516 has 12 divisors (see below), whose sum is σ = 173900160. Its totient is φ = 41404760.

The previous prime is 91090429. The next prime is 91090547. The reversal of 91090516 is 61509019.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1035076 + ... + 1035163.

It is an arithmetic number, because the mean of its divisors is an integer number (14491680).

Almost surely, 2^91090516 is an apocalyptic number.

It is an amenable number.

91090516 is a deficient number, since it is larger than the sum of its proper divisors (82809644).

91090516 is a wasteful number, since it uses less digits than its factorization.

91090516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2070254 (or 2070252 counting only the distinct ones).

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 91090516 is about 9544.1351624964. The cubic root of 91090516 is about 449.9432290522.

The spelling of 91090516 in words is "ninety-one million, ninety thousand, five hundred sixteen".