79891329839 has 2 divisors, whose sum is σ = 79891329840. Its totient is φ = 79891329838.

The previous prime is 79891329823. The next prime is 79891329857. The reversal of 79891329839 is 93892319897.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79891329839 - 2⁴ = 79891329823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79891329139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39945664919 + 39945664920.

It is an arithmetic number, because the mean of its divisors is an integer number (39945664920).

Almost surely, 2^79891329839 is an apocalyptic number.

79891329839 is a deficient number, since it is larger than the sum of its proper divisors (1).

79891329839 is an equidigital number, since it uses as much as digits as its factorization.

79891329839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 68.

The spelling of 79891329839 in words is "seventy-nine billion, eight hundred ninety-one million, three hundred twenty-nine thousand, eight hundred thirty-nine".