79279171 has 2 divisors, whose sum is σ = 79279172. Its totient is φ = 79279170.

The previous prime is 79279163. The next prime is 79279201. The reversal of 79279171 is 17197297.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79279171 - 2³ = 79279163 is a prime.

It is not a weakly prime, because it can be changed into another prime (79279111) 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 as a sum of consecutive naturals, namely, 39639585 + 39639586.

It is an arithmetic number, because the mean of its divisors is an integer number (39639586).

Almost surely, 2^79279171 is an apocalyptic number.

79279171 is a deficient number, since it is larger than the sum of its proper divisors (1).

79279171 is an equidigital number, since it uses as much as digits as its factorization.

79279171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55566, while the sum is 43.

The square root of 79279171 is about 8903.8851632307. The cubic root of 79279171 is about 429.5888823447.

The spelling of 79279171 in words is "seventy-nine million, two hundred seventy-nine thousand, one hundred seventy-one".