6399047569 has 2 divisors, whose sum is σ = 6399047570. Its totient is φ = 6399047568.

The previous prime is 6399047467. The next prime is 6399047573. The reversal of 6399047569 is 9657409936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6386087569 + 12960000 = 79913^2 + 3600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6399047569 is a prime.

It is a super-2 number, since 2×6399047569² = 81895619580649619522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6399747569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3199523784 + 3199523785.

It is an arithmetic number, because the mean of its divisors is an integer number (3199523785).

Almost surely, 2^6399047569 is an apocalyptic number.

It is an amenable number.

6399047569 is a deficient number, since it is larger than the sum of its proper divisors (1).

6399047569 is an equidigital number, since it uses as much as digits as its factorization.

6399047569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11022480, while the sum is 58.

The square root of 6399047569 is about 79994.0470847675. The cubic root of 6399047569 is about 1856.5434290199.

The spelling of 6399047569 in words is "six billion, three hundred ninety-nine million, forty-seven thousand, five hundred sixty-nine".