79855979 has 8 divisors (see below), whose sum is σ = 91376640. Its totient is φ = 68363496.

The previous prime is 79855967. The next prime is 79855981. The reversal of 79855979 is 97955897.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79855979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79855939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569 + ... + 12650.

It is an arithmetic number, because the mean of its divisors is an integer number (11422080).

Almost surely, 2^79855979 is an apocalyptic number.

79855979 is a deficient number, since it is larger than the sum of its proper divisors (11520661).

79855979 is a wasteful number, since it uses less digits than its factorization.

79855979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14089.

The product of its digits is 7144200, while the sum is 59.

The square root of 79855979 is about 8936.2172645924. The cubic root of 79855979 is about 430.6282128210.

The spelling of 79855979 in words is "seventy-nine million, eight hundred fifty-five thousand, nine hundred seventy-nine".