79169173 has 2 divisors, whose sum is σ = 79169174. Its totient is φ = 79169172.

The previous prime is 79169171. The next prime is 79169177. The reversal of 79169173 is 37196197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71199844 + 7969329 = 8438^2 + 2823^2 .

It is a cyclic number.

It is not a de Polignac number, because 79169173 - 2¹ = 79169171 is a prime.

Together with 79169171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79169171) 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 as a sum of consecutive naturals, namely, 39584586 + 39584587.

It is an arithmetic number, because the mean of its divisors is an integer number (39584587).

Almost surely, 2^79169173 is an apocalyptic number.

It is an amenable number.

79169173 is a deficient number, since it is larger than the sum of its proper divisors (1).

79169173 is an equidigital number, since it uses as much as digits as its factorization.

79169173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 71442, while the sum is 43.

The square root of 79169173 is about 8897.7060526857. The cubic root of 79169173 is about 429.3901088682.

The spelling of 79169173 in words is "seventy-nine million, one hundred sixty-nine thousand, one hundred seventy-three".