79936987 has 4 divisors (see below), whose sum is σ = 86086000. Its totient is φ = 73787976.

The previous prime is 79936981. The next prime is 79936999. The reversal of 79936987 is 78963997.

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

It is a cyclic number.

It is not a de Polignac number, because 79936987 - 2³ = 79936979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79936981) by changing a digit.

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, 3074487 + ... + 3074512.

It is an arithmetic number, because the mean of its divisors is an integer number (21521500).

Almost surely, 2^79936987 is an apocalyptic number.

79936987 is a deficient number, since it is larger than the sum of its proper divisors (6149013).

79936987 is a wasteful number, since it uses less digits than its factorization.

79936987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149012.

The product of its digits is 5143824, while the sum is 58.

The square root of 79936987 is about 8940.7486822972. The cubic root of 79936987 is about 430.7737771294.

The spelling of 79936987 in words is "seventy-nine million, nine hundred thirty-six thousand, nine hundred eighty-seven".