91998124 has 12 divisors (see below), whose sum is σ = 161897400. Its totient is φ = 45741728.

The previous prime is 91998119. The next prime is 91998131. The reversal of 91998124 is 42189919.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63529 + ... + 64960.

It is an arithmetic number, because the mean of its divisors is an integer number (13491450).

Almost surely, 2^91998124 is an apocalyptic number.

It is an amenable number.

91998124 is a deficient number, since it is larger than the sum of its proper divisors (69899276).

91998124 is a wasteful number, since it uses less digits than its factorization.

91998124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128672 (or 128670 counting only the distinct ones).

The product of its digits is 46656, while the sum is 43.

The square root of 91998124 is about 9591.5652528667. The cubic root of 91998124 is about 451.4326750720.

The spelling of 91998124 in words is "ninety-one million, nine hundred ninety-eight thousand, one hundred twenty-four".