399348143291 has 2 divisors, whose sum is σ = 399348143292. Its totient is φ = 399348143290.

The previous prime is 399348143261. The next prime is 399348143317. The reversal of 399348143291 is 192341843993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399348143291 - 2¹⁸ = 399347881147 is a prime.

It is not a weakly prime, because it can be changed into another prime (399348143261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199674071645 + 199674071646.

It is an arithmetic number, because the mean of its divisors is an integer number (199674071646).

Almost surely, 2^399348143291 is an apocalyptic number.

399348143291 is a deficient number, since it is larger than the sum of its proper divisors (1).

399348143291 is an equidigital number, since it uses as much as digits as its factorization.

399348143291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 56.

The spelling of 399348143291 in words is "three hundred ninety-nine billion, three hundred forty-eight million, one hundred forty-three thousand, two hundred ninety-one".