79540717 has 2 divisors, whose sum is σ = 79540718. Its totient is φ = 79540716.

The previous prime is 79540667. The next prime is 79540723. The reversal of 79540717 is 71704597.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60435076 + 19105641 = 7774^2 + 4371^2 .

It is an emirp because it is prime and its reverse (71704597) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79540717 - 2⁷ = 79540589 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 79540717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79540777) 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, 39770358 + 39770359.

It is an arithmetic number, because the mean of its divisors is an integer number (39770359).

Almost surely, 2^79540717 is an apocalyptic number.

It is an amenable number.

79540717 is a deficient number, since it is larger than the sum of its proper divisors (1).

79540717 is an equidigital number, since it uses as much as digits as its factorization.

79540717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61740, while the sum is 40.

The square root of 79540717 is about 8918.5602537629. The cubic root of 79540717 is about 430.0607756173.

The spelling of 79540717 in words is "seventy-nine million, five hundred forty thousand, seven hundred seventeen".