91953980 has 24 divisors (see below), whose sum is σ = 197814960. Its totient is φ = 35884160.

The previous prime is 91953947. The next prime is 91953997. The reversal of 91953980 is 8935919.

It is a congruent number.

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, 55250 + ... + 56889.

It is an arithmetic number, because the mean of its divisors is an integer number (8242290).

Almost surely, 2^91953980 is an apocalyptic number.

It is an amenable number.

91953980 is an abundant number, since it is smaller than the sum of its proper divisors (105860980).

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

91953980 is a wasteful number, since it uses less digits than its factorization.

91953980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112189 (or 112187 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 91953980 is about 9589.2637882165. The cubic root of 91953980 is about 451.3604589898.

The spelling of 91953980 in words is "ninety-one million, nine hundred fifty-three thousand, nine hundred eighty".