87167979 has 12 divisors (see below), whose sum is σ = 125991216. Its totient is φ = 58074192.

The previous prime is 87167947. The next prime is 87167981. The reversal of 87167979 is 97976178.

It is not a de Polignac number, because 87167979 - 2⁵ = 87167947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87167929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22149 + ... + 25785.

It is an arithmetic number, because the mean of its divisors is an integer number (10499268).

Almost surely, 2^87167979 is an apocalyptic number.

87167979 is a deficient number, since it is larger than the sum of its proper divisors (38823237).

87167979 is a wasteful number, since it uses less digits than its factorization.

87167979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6306 (or 6303 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 87167979 is about 9336.3793303400. The cubic root of 87167979 is about 443.3897600303.

The spelling of 87167979 in words is "eighty-seven million, one hundred sixty-seven thousand, nine hundred seventy-nine".