87179871 has 4 divisors (see below), whose sum is σ = 116239832. Its totient is φ = 58119912.

The previous prime is 87179863. The next prime is 87179879. The reversal of 87179871 is 17897178.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87179863) and next prime (87179879).

It is not a de Polignac number, because 87179871 - 2³ = 87179863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87179871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87179879) 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 3 ways as a sum of consecutive naturals, for example, 14529976 + ... + 14529981.

It is an arithmetic number, because the mean of its divisors is an integer number (29059958).

Almost surely, 2^87179871 is an apocalyptic number.

87179871 is a deficient number, since it is larger than the sum of its proper divisors (29059961).

87179871 is a wasteful number, since it uses less digits than its factorization.

87179871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29059960.

The product of its digits is 197568, while the sum is 48.

The square root of 87179871 is about 9337.0161722041. The cubic root of 87179871 is about 443.4099224467.

The spelling of 87179871 in words is "eighty-seven million, one hundred seventy-nine thousand, eight hundred seventy-one".