79979413 has 2 divisors, whose sum is σ = 79979414. Its totient is φ = 79979412.

The previous prime is 79979401. The next prime is 79979429. The reversal of 79979413 is 31497997.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47238129 + 32741284 = 6873^2 + 5722^2 .

It is an emirp because it is prime and its reverse (31497997) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79979413 - 2⁹ = 79978901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79979453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39989706 + 39989707.

It is an arithmetic number, because the mean of its divisors is an integer number (39989707).

Almost surely, 2^79979413 is an apocalyptic number.

It is an amenable number.

79979413 is a deficient number, since it is larger than the sum of its proper divisors (1).

79979413 is an equidigital number, since it uses as much as digits as its factorization.

79979413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 79979413 is about 8943.1209876642. The cubic root of 79979413 is about 430.8499737130.

The spelling of 79979413 in words is "seventy-nine million, nine hundred seventy-nine thousand, four hundred thirteen".