6399679093 has 2 divisors, whose sum is σ = 6399679094. Its totient is φ = 6399679092.

The previous prime is 6399679057. The next prime is 6399679147. The reversal of 6399679093 is 3909769936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5642713924 + 756965169 = 75118^2 + 27513^2 .

It is a cyclic number.

It is not a de Polignac number, because 6399679093 - 2²⁹ = 5862808181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6399670093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199839546 + 3199839547.

It is an arithmetic number, because the mean of its divisors is an integer number (3199839547).

Almost surely, 2^6399679093 is an apocalyptic number.

It is an amenable number.

6399679093 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399679093 is an equidigital number, since it uses as much as digits as its factorization.

6399679093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14880348, while the sum is 61.

The square root of 6399679093 is about 79997.9943061075. The cubic root of 6399679093 is about 1856.6045012942.

The spelling of 6399679093 in words is "six billion, three hundred ninety-nine million, six hundred seventy-nine thousand, ninety-three".