87979886 has 4 divisors (see below), whose sum is σ = 131969832. Its totient is φ = 43989942.

The previous prime is 87979847. The next prime is 87979897. The reversal of 87979886 is 68897978.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21994970 + ... + 21994973.

It is an arithmetic number, because the mean of its divisors is an integer number (32992458).

Almost surely, 2^87979886 is an apocalyptic number.

87979886 is a deficient number, since it is larger than the sum of its proper divisors (43989946).

87979886 is a wasteful number, since it uses less digits than its factorization.

87979886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43989945.

The product of its digits is 12192768, while the sum is 62.

The square root of 87979886 is about 9379.7593785768. The cubic root of 87979886 is about 444.7621267925.

The spelling of 87979886 in words is "eighty-seven million, nine hundred seventy-nine thousand, eight hundred eighty-six".