79419517 has 2 divisors, whose sum is σ = 79419518. Its totient is φ = 79419516.

The previous prime is 79419503. The next prime is 79419521. The reversal of 79419517 is 71591497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72097081 + 7322436 = 8491^2 + 2706^2 .

It is a cyclic number.

It is not a de Polignac number, because 79419517 - 2²³ = 71030909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79419017) 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, 39709758 + 39709759.

It is an arithmetic number, because the mean of its divisors is an integer number (39709759).

Almost surely, 2^79419517 is an apocalyptic number.

It is an amenable number.

79419517 is a deficient number, since it is larger than the sum of its proper divisors (1).

79419517 is an equidigital number, since it uses as much as digits as its factorization.

79419517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 79419517 is about 8911.7628446902. The cubic root of 79419517 is about 429.8422298431.

The spelling of 79419517 in words is "seventy-nine million, four hundred nineteen thousand, five hundred seventeen".