79824013 has 2 divisors, whose sum is σ = 79824014. Its totient is φ = 79824012.

The previous prime is 79823999. The next prime is 79824023. The reversal of 79824013 is 31042897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55980324 + 23843689 = 7482^2 + 4883^2 .

It is an emirp because it is prime and its reverse (31042897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79824013 - 2¹⁷ = 79692941 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79824013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79824023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39912006 + 39912007.

It is an arithmetic number, because the mean of its divisors is an integer number (39912007).

Almost surely, 2^79824013 is an apocalyptic number.

It is an amenable number.

79824013 is a deficient number, since it is larger than the sum of its proper divisors (1).

79824013 is an equidigital number, since it uses as much as digits as its factorization.

79824013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 79824013 is about 8934.4285211758. The cubic root of 79824013 is about 430.5707456208.

The spelling of 79824013 in words is "seventy-nine million, eight hundred twenty-four thousand, thirteen".