91528506 has 12 divisors (see below), whose sum is σ = 198311802. Its totient is φ = 30509496.

The previous prime is 91528483. The next prime is 91528511. The reversal of 91528506 is 60582519.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 53890281 + 37638225 = 7341^2 + 6135^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2542441 + ... + 2542476.

Almost surely, 2^91528506 is an apocalyptic number.

91528506 is an abundant number, since it is smaller than the sum of its proper divisors (106783296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91528506 is a wasteful number, since it uses less digits than its factorization.

91528506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5084925 (or 5084922 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 91528506 is about 9567.0531513105. The cubic root of 91528506 is about 450.6632294310.

The spelling of 91528506 in words is "ninety-one million, five hundred twenty-eight thousand, five hundred six".