91914988 has 36 divisors (see below), whose sum is σ = 187220376. Its totient is φ = 39318400.

The previous prime is 91914959. The next prime is 91914997. The reversal of 91914988 is 88941919.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2643 + ... + 13813.

It is an arithmetic number, because the mean of its divisors is an integer number (5200566).

Almost surely, 2^91914988 is an apocalyptic number.

It is an amenable number.

91914988 is an abundant number, since it is smaller than the sum of its proper divisors (95305388).

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

91914988 is a wasteful number, since it uses less digits than its factorization.

91914988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11214 (or 11201 counting only the distinct ones).

The product of its digits is 186624, while the sum is 49.

The square root of 91914988 is about 9587.2304655724. The cubic root of 91914988 is about 451.2966519448.

The spelling of 91914988 in words is "ninety-one million, nine hundred fourteen thousand, nine hundred eighty-eight".