87491312 has 20 divisors (see below), whose sum is σ = 171904176. Its totient is φ = 43128960.

The previous prime is 87491297. The next prime is 87491323. The reversal of 87491312 is 21319478.

It is a congruent number.

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, 37373 + ... + 39644.

Almost surely, 2^87491312 is an apocalyptic number.

It is an amenable number.

87491312 is a deficient number, since it is larger than the sum of its proper divisors (84412864).

87491312 is a wasteful number, since it uses less digits than its factorization.

87491312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77096 (or 77090 counting only the distinct ones).

The product of its digits is 12096, while the sum is 35.

The square root of 87491312 is about 9353.6790622728. The cubic root of 87491312 is about 443.9373068422.

The spelling of 87491312 in words is "eighty-seven million, four hundred ninety-one thousand, three hundred twelve".