91646690 has 16 divisors (see below), whose sum is σ = 173646720. Its totient is φ = 34729200.

The previous prime is 91646657. The next prime is 91646707. The reversal of 91646690 is 9664619.

It is a super-2 number, since 2×91646690² = 16798231575912200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240986 + ... + 241365.

It is an arithmetic number, because the mean of its divisors is an integer number (10852920).

Almost surely, 2^91646690 is an apocalyptic number.

91646690 is a deficient number, since it is larger than the sum of its proper divisors (82000030).

91646690 is a wasteful number, since it uses less digits than its factorization.

91646690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482377.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 91646690 is about 9573.2277733270. The cubic root of 91646690 is about 450.8571153863.

The spelling of 91646690 in words is "ninety-one million, six hundred forty-six thousand, six hundred ninety".