87137904 has 40 divisors (see below), whose sum is σ = 257265280. Its totient is φ = 24896448.

The previous prime is 87137899. The next prime is 87137917. The reversal of 87137904 is 40973178.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129334 + ... + 130005.

It is an arithmetic number, because the mean of its divisors is an integer number (6431632).

Almost surely, 2^87137904 is an apocalyptic number.

87137904 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

87137904 is an abundant number, since it is smaller than the sum of its proper divisors (170127376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

87137904 is a wasteful number, since it uses less digits than its factorization.

87137904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259357 (or 259351 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 87137904 is about 9334.7685563168. The cubic root of 87137904 is about 443.3387608710.

The spelling of 87137904 in words is "eighty-seven million, one hundred thirty-seven thousand, nine hundred four".