8139166813 has 2 divisors, whose sum is σ = 8139166814. Its totient is φ = 8139166812.

The previous prime is 8139166799. The next prime is 8139166829. The reversal of 8139166813 is 3186619318.

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., 4659700644 + 3479466169 = 68262^2 + 58987^2 .

It is a cyclic number.

It is not a de Polignac number, because 8139166813 - 2²⁵ = 8105612381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8139166843) 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, 4069583406 + 4069583407.

It is an arithmetic number, because the mean of its divisors is an integer number (4069583407).

Almost surely, 2^8139166813 is an apocalyptic number.

It is an amenable number.

8139166813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8139166813 is an equidigital number, since it uses as much as digits as its factorization.

8139166813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 8139166813 is about 90217.3310013104. The cubic root of 8139166813 is about 2011.5306289596.

The spelling of 8139166813 in words is "eight billion, one hundred thirty-nine million, one hundred sixty-six thousand, eight hundred thirteen".