87158939 has 8 divisors (see below), whose sum is σ = 102302688. Its totient is φ = 72688320.

The previous prime is 87158933. The next prime is 87158941. The reversal of 87158939 is 93985178.

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 87158939 - 2⁴ = 87158923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87158933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168002 + ... + 168519.

It is an arithmetic number, because the mean of its divisors is an integer number (12787836).

Almost surely, 2^87158939 is an apocalyptic number.

87158939 is a deficient number, since it is larger than the sum of its proper divisors (15143749).

87158939 is a wasteful number, since it uses less digits than its factorization.

87158939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336565.

The product of its digits is 544320, while the sum is 50.

The square root of 87158939 is about 9335.8951900715. The cubic root of 87158939 is about 443.3744318404.

The spelling of 87158939 in words is "eighty-seven million, one hundred fifty-eight thousand, nine hundred thirty-nine".