79803986 has 16 divisors (see below), whose sum is σ = 121768920. Its totient is φ = 39219840.

The previous prime is 79803973. The next prime is 79803989. The reversal of 79803986 is 68930897.

It can be written as a sum of positive squares in 4 ways, for example, as 31013761 + 48790225 = 5569^2 + 6985^2 .

It is not an unprimeable number, because it can be changed into a prime (79803989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30980 + ... + 33456.

Almost surely, 2^79803986 is an apocalyptic number.

79803986 is a deficient number, since it is larger than the sum of its proper divisors (41964934).

79803986 is a wasteful number, since it uses less digits than its factorization.

79803986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 79803986 is about 8933.3076740925. The cubic root of 79803986 is about 430.5347340614.

The spelling of 79803986 in words is "seventy-nine million, eight hundred three thousand, nine hundred eighty-six".