79621986 has 8 divisors (see below), whose sum is σ = 159243984. Its totient is φ = 26540660.

The previous prime is 79621973. The next prime is 79622051. The reversal of 79621986 is 68912697.

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

79621986 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6635160 + ... + 6635171.

It is an arithmetic number, because the mean of its divisors is an integer number (19905498).

Almost surely, 2^79621986 is an apocalyptic number.

79621986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79621986 is a wasteful number, since it uses less digits than its factorization.

79621986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13270336.

The product of its digits is 326592, while the sum is 48.

The square root of 79621986 is about 8923.1152631802. The cubic root of 79621986 is about 430.2071941809.

The spelling of 79621986 in words is "seventy-nine million, six hundred twenty-one thousand, nine hundred eighty-six".