399704599859 has 2 divisors, whose sum is σ = 399704599860. Its totient is φ = 399704599858.

The previous prime is 399704599831. The next prime is 399704599871. The reversal of 399704599859 is 958995407993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399704599859 - 2²⁴ = 399687822643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399704599859.

It is not a weakly prime, because it can be changed into another prime (399704199859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199852299929 + 199852299930.

It is an arithmetic number, because the mean of its divisors is an integer number (199852299930).

Almost surely, 2^399704599859 is an apocalyptic number.

399704599859 is a deficient number, since it is larger than the sum of its proper divisors (1).

399704599859 is an equidigital number, since it uses as much as digits as its factorization.

399704599859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 992023200, while the sum is 77.

It can be divided in two parts, 3997045 and 99859, that added together give a palindrome (4096904).

The spelling of 399704599859 in words is "three hundred ninety-nine billion, seven hundred four million, five hundred ninety-nine thousand, eight hundred fifty-nine".