85979814013 has 2 divisors, whose sum is σ = 85979814014. Its totient is φ = 85979814012.

The previous prime is 85979813929. The next prime is 85979814043. The reversal of 85979814013 is 31041897958.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83058087204 + 2921726809 = 288198^2 + 54053^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85979814013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85979814043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42989907006 + 42989907007.

It is an arithmetic number, because the mean of its divisors is an integer number (42989907007).

Almost surely, 2^85979814013 is an apocalyptic number.

It is an amenable number.

85979814013 is a deficient number, since it is larger than the sum of its proper divisors (1).

85979814013 is an equidigital number, since it uses as much as digits as its factorization.

85979814013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The spelling of 85979814013 in words is "eighty-five billion, nine hundred seventy-nine million, eight hundred fourteen thousand, thirteen".