399396291863 has 2 divisors, whose sum is σ = 399396291864. Its totient is φ = 399396291862.

The previous prime is 399396291817. The next prime is 399396291923. The reversal of 399396291863 is 368192693993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399396291863 - 2⁶ = 399396291799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399396291793 and 399396291802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399396291563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199698145931 + 199698145932.

It is an arithmetic number, because the mean of its divisors is an integer number (199698145932).

Almost surely, 2^399396291863 is an apocalyptic number.

399396291863 is a deficient number, since it is larger than the sum of its proper divisors (1).

399396291863 is an equidigital number, since it uses as much as digits as its factorization.

399396291863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102036672, while the sum is 68.

The spelling of 399396291863 in words is "three hundred ninety-nine billion, three hundred ninety-six million, two hundred ninety-one thousand, eight hundred sixty-three".