399162401316491 has 2 divisors, whose sum is σ = 399162401316492. Its totient is φ = 399162401316490.

The previous prime is 399162401316473. The next prime is 399162401316517. The reversal of 399162401316491 is 194613104261993.

It is a weak prime.

It is an emirp because it is prime and its reverse (194613104261993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399162401316491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399162401316491.

It is not a weakly prime, because it can be changed into another prime (399162401316391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199581200658245 + 199581200658246.

It is an arithmetic number, because the mean of its divisors is an integer number (199581200658246).

Almost surely, 2^{399162401316491} is an apocalyptic number.

399162401316491 is a deficient number, since it is larger than the sum of its proper divisors (1).

399162401316491 is an equidigital number, since it uses as much as digits as its factorization.

399162401316491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7558272, while the sum is 59.

The spelling of 399162401316491 in words is "three hundred ninety-nine trillion, one hundred sixty-two billion, four hundred one million, three hundred sixteen thousand, four hundred ninety-one".