91603660 has 24 divisors (see below), whose sum is σ = 194806080. Its totient is φ = 36177024.

The previous prime is 91603657. The next prime is 91603669. The reversal of 91603660 is 6630619.

It is not an unprimeable number, because it can be changed into a prime (91603669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27409 + ... + 30568.

It is an arithmetic number, because the mean of its divisors is an integer number (8116920).

Almost surely, 2^91603660 is an apocalyptic number.

It is an amenable number.

91603660 is an abundant number, since it is smaller than the sum of its proper divisors (103202420).

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

91603660 is a wasteful number, since it uses less digits than its factorization.

91603660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58065 (or 58063 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 91603660 is about 9570.9800961030. The cubic root of 91603660 is about 450.7865421200.

The spelling of 91603660 in words is "ninety-one million, six hundred three thousand, six hundred sixty".