79169979 has 32 divisors (see below), whose sum is σ = 132526080. Its totient is φ = 40990752.

The previous prime is 79169963. The next prime is 79169989. The reversal of 79169979 is 97996197.

It is not a de Polignac number, because 79169979 - 2⁴ = 79169963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (79169989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4864 + ... + 13490.

It is an arithmetic number, because the mean of its divisors is an integer number (4141440).

Almost surely, 2^79169979 is an apocalyptic number.

79169979 is a deficient number, since it is larger than the sum of its proper divisors (53356101).

79169979 is a wasteful number, since it uses less digits than its factorization.

79169979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8679.

The product of its digits is 1928934, while the sum is 57.

The square root of 79169979 is about 8897.7513451433. The cubic root of 79169979 is about 429.3915660315.

The spelling of 79169979 in words is "seventy-nine million, one hundred sixty-nine thousand, nine hundred seventy-nine".