79425539 has 2 divisors, whose sum is σ = 79425540. Its totient is φ = 79425538.

The previous prime is 79425523. The next prime is 79425551. The reversal of 79425539 is 93552497.

It is a strong prime.

It is an emirp because it is prime and its reverse (93552497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79425539 - 2⁴ = 79425523 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79425539.

It is not a weakly prime, because it can be changed into another prime (79425589) 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, 39712769 + 39712770.

It is an arithmetic number, because the mean of its divisors is an integer number (39712770).

Almost surely, 2^79425539 is an apocalyptic number.

79425539 is a deficient number, since it is larger than the sum of its proper divisors (1).

79425539 is an equidigital number, since it uses as much as digits as its factorization.

79425539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 44.

The square root of 79425539 is about 8912.1007063430. The cubic root of 79425539 is about 429.8530938582.

The spelling of 79425539 in words is "seventy-nine million, four hundred twenty-five thousand, five hundred thirty-nine".