91474988 has 12 divisors (see below), whose sum is σ = 174634152. Its totient is φ = 41579520.

The previous prime is 91474963. The next prime is 91474991. The reversal of 91474988 is 88947419.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1039445 + ... + 1039532.

It is an arithmetic number, because the mean of its divisors is an integer number (14552846).

Almost surely, 2^91474988 is an apocalyptic number.

It is an amenable number.

91474988 is a deficient number, since it is larger than the sum of its proper divisors (83159164).

91474988 is a wasteful number, since it uses less digits than its factorization.

91474988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2078992 (or 2078990 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 91474988 is about 9564.2557473125. The cubic root of 91474988 is about 450.5753759373.

The spelling of 91474988 in words is "ninety-one million, four hundred seventy-four thousand, nine hundred eighty-eight".