91625620 has 12 divisors (see below), whose sum is σ = 192413844. Its totient is φ = 36650240.

The previous prime is 91625593. The next prime is 91625621. The reversal of 91625620 is 2652619.

It can be written as a sum of positive squares in 2 ways, for example, as 71876484 + 19749136 = 8478^2 + 4444^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91625621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2290621 + ... + 2290660.

It is an arithmetic number, because the mean of its divisors is an integer number (16034487).

Almost surely, 2^91625620 is an apocalyptic number.

It is an amenable number.

91625620 is an abundant number, since it is smaller than the sum of its proper divisors (100788224).

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

91625620 is a wasteful number, since it uses less digits than its factorization.

91625620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4581290 (or 4581288 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 91625620 is about 9572.1272452888. The cubic root of 91625620 is about 450.8225613560.

The spelling of 91625620 in words is "ninety-one million, six hundred twenty-five thousand, six hundred twenty".