91487912 has 32 divisors (see below), whose sum is σ = 174696480. Its totient is φ = 44909760.

The previous prime is 91487909. The next prime is 91487923. The reversal of 91487912 is 21978419.

It is a self number, because there is not a number n which added to its sum of digits gives 91487912.

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 7 ways as a sum of consecutive naturals, for example, 139778 + ... + 140430.

It is an arithmetic number, because the mean of its divisors is an integer number (5459265).

Almost surely, 2^91487912 is an apocalyptic number.

It is an amenable number.

91487912 is a deficient number, since it is larger than the sum of its proper divisors (83208568).

91487912 is a wasteful number, since it uses less digits than its factorization.

91487912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 949 counting only the distinct ones).

The product of its digits is 36288, while the sum is 41.

The square root of 91487912 is about 9564.9313641029. The cubic root of 91487912 is about 450.5965947137.

The spelling of 91487912 in words is "ninety-one million, four hundred eighty-seven thousand, nine hundred twelve".