87731894 has 8 divisors (see below), whose sum is σ = 131687760. Its totient is φ = 43835976.

The previous prime is 87731893. The next prime is 87731899. The reversal of 87731894 is 49813778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87731893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11129 + ... + 17300.

It is an arithmetic number, because the mean of its divisors is an integer number (16460970).

Almost surely, 2^87731894 is an apocalyptic number.

87731894 is a deficient number, since it is larger than the sum of its proper divisors (43955866).

87731894 is a wasteful number, since it uses less digits than its factorization.

87731894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29974.

The product of its digits is 338688, while the sum is 47.

The square root of 87731894 is about 9366.5305209560. The cubic root of 87731894 is about 444.3438446523.

The spelling of 87731894 in words is "eighty-seven million, seven hundred thirty-one thousand, eight hundred ninety-four".