79879340399 has 2 divisors, whose sum is σ = 79879340400. Its totient is φ = 79879340398.

The previous prime is 79879340357. The next prime is 79879340413. The reversal of 79879340399 is 99304397897.

It is a strong prime.

It is an emirp because it is prime and its reverse (99304397897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79879340399 - 2³² = 75584373103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79879340329) 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, 39939670199 + 39939670200.

It is an arithmetic number, because the mean of its divisors is an integer number (39939670200).

Almost surely, 2^79879340399 is an apocalyptic number.

79879340399 is a deficient number, since it is larger than the sum of its proper divisors (1).

79879340399 is an equidigital number, since it uses as much as digits as its factorization.

79879340399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92588832, while the sum is 68.

The spelling of 79879340399 in words is "seventy-nine billion, eight hundred seventy-nine million, three hundred forty thousand, three hundred ninety-nine".