87393731 has 8 divisors (see below), whose sum is σ = 88102080. Its totient is φ = 86688448.

The previous prime is 87393703. The next prime is 87393737. The reversal of 87393731 is 13739378.

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

It is a cyclic number.

It is not a de Polignac number, because 87393731 - 2²² = 83199427 is a prime.

It is a super-2 number, since 2×87393731² = 15275328436200722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87393737) by changing a digit.

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, 121190 + ... + 121908.

It is an arithmetic number, because the mean of its divisors is an integer number (11012760).

Almost surely, 2^87393731 is an apocalyptic number.

87393731 is a deficient number, since it is larger than the sum of its proper divisors (708349).

87393731 is a wasteful number, since it uses less digits than its factorization.

87393731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1533.

The product of its digits is 95256, while the sum is 41.

The square root of 87393731 is about 9348.4614242131. The cubic root of 87393731 is about 443.7722010714.

The spelling of 87393731 in words is "eighty-seven million, three hundred ninety-three thousand, seven hundred thirty-one".