79387117 has 2 divisors, whose sum is σ = 79387118. Its totient is φ = 79387116.

The previous prime is 79387109. The next prime is 79387141. The reversal of 79387117 is 71178397.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49477156 + 29909961 = 7034^2 + 5469^2 .

It is a cyclic number.

It is not a de Polignac number, because 79387117 - 2³ = 79387109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79387157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39693558 + 39693559.

It is an arithmetic number, because the mean of its divisors is an integer number (39693559).

Almost surely, 2^79387117 is an apocalyptic number.

It is an amenable number.

79387117 is a deficient number, since it is larger than the sum of its proper divisors (1).

79387117 is an equidigital number, since it uses as much as digits as its factorization.

79387117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 43.

The square root of 79387117 is about 8909.9448370907. The cubic root of 79387117 is about 429.7837690555.

The spelling of 79387117 in words is "seventy-nine million, three hundred eighty-seven thousand, one hundred seventeen".