89191912 has 8 divisors (see below), whose sum is σ = 167234850. Its totient is φ = 44595952.

The previous prime is 89191903. The next prime is 89191937. The reversal of 89191912 is 21919198.

It can be written as a sum of positive squares in only one way, i.e., 88623396 + 568516 = 9414^2 + 754^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5574487 + ... + 5574502.

Almost surely, 2^89191912 is an apocalyptic number.

It is an amenable number.

89191912 is a deficient number, since it is larger than the sum of its proper divisors (78042938).

89191912 is a wasteful number, since it uses less digits than its factorization.

89191912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11148995 (or 11148991 counting only the distinct ones).

The product of its digits is 11664, while the sum is 40.

The square root of 89191912 is about 9444.1469704786. The cubic root of 89191912 is about 446.7951923400.

The spelling of 89191912 in words is "eighty-nine million, one hundred ninety-one thousand, nine hundred twelve".