399396291799 has 2 divisors, whose sum is σ = 399396291800. Its totient is φ = 399396291798.

The previous prime is 399396291779. The next prime is 399396291817. The reversal of 399396291799 is 997192693993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399396291799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399396291719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199698145899 + 199698145900.

It is an arithmetic number, because the mean of its divisors is an integer number (199698145900).

Almost surely, 2^399396291799 is an apocalyptic number.

399396291799 is a deficient number, since it is larger than the sum of its proper divisors (1).

399396291799 is an equidigital number, since it uses as much as digits as its factorization.

399396291799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 401769396, while the sum is 76.

The spelling of 399396291799 in words is "three hundred ninety-nine billion, three hundred ninety-six million, two hundred ninety-one thousand, seven hundred ninety-nine".