79118189 has 2 divisors, whose sum is σ = 79118190. Its totient is φ = 79118188.

The previous prime is 79118167. The next prime is 79118209. The reversal of 79118189 is 98181197.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66748900 + 12369289 = 8170^2 + 3517^2 .

It is a cyclic number.

It is not a de Polignac number, because 79118189 - 2⁸ = 79117933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79118129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39559094 + 39559095.

It is an arithmetic number, because the mean of its divisors is an integer number (39559095).

Almost surely, 2^79118189 is an apocalyptic number.

It is an amenable number.

79118189 is a deficient number, since it is larger than the sum of its proper divisors (1).

79118189 is an equidigital number, since it uses as much as digits as its factorization.

79118189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 44.

The square root of 79118189 is about 8894.8405831695. The cubic root of 79118189 is about 429.2979150442.

The spelling of 79118189 in words is "seventy-nine million, one hundred eighteen thousand, one hundred eighty-nine".