399108067399 has 2 divisors, whose sum is σ = 399108067400. Its totient is φ = 399108067398.

The previous prime is 399108067381. The next prime is 399108067411. The reversal of 399108067399 is 993760801993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399108067399 - 2³⁵ = 364748329031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399108067399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399108067199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199554033699 + 199554033700.

It is an arithmetic number, because the mean of its divisors is an integer number (199554033700).

Almost surely, 2^399108067399 is an apocalyptic number.

399108067399 is a deficient number, since it is larger than the sum of its proper divisors (1).

399108067399 is an equidigital number, since it uses as much as digits as its factorization.

399108067399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19840464, while the sum is 64.

The spelling of 399108067399 in words is "three hundred ninety-nine billion, one hundred eight million, sixty-seven thousand, three hundred ninety-nine".