399572805839 has 2 divisors, whose sum is σ = 399572805840. Its totient is φ = 399572805838.

The previous prime is 399572805833. The next prime is 399572805859. The reversal of 399572805839 is 938508275993.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399572805839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399572805833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199786402919 + 199786402920.

It is an arithmetic number, because the mean of its divisors is an integer number (199786402920).

Almost surely, 2^399572805839 is an apocalyptic number.

399572805839 is a deficient number, since it is larger than the sum of its proper divisors (1).

399572805839 is an equidigital number, since it uses as much as digits as its factorization.

399572805839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 146966400, while the sum is 68.

The spelling of 399572805839 in words is "three hundred ninety-nine billion, five hundred seventy-two million, eight hundred five thousand, eight hundred thirty-nine".