399312853 has 2 divisors, whose sum is σ = 399312854. Its totient is φ = 399312852.

The previous prime is 399312841. The next prime is 399312869. The reversal of 399312853 is 358213993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 399080529 + 232324 = 19977^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 399312853 - 2²¹ = 397215701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399312833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199656426 + 199656427.

It is an arithmetic number, because the mean of its divisors is an integer number (199656427).

Almost surely, 2^399312853 is an apocalyptic number.

It is an amenable number.

399312853 is a deficient number, since it is larger than the sum of its proper divisors (1).

399312853 is an equidigital number, since it uses as much as digits as its factorization.

399312853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 43.

The square root of 399312853 is about 19982.8139409844. The cubic root of 399312853 is about 736.3841460356.

The spelling of 399312853 in words is "three hundred ninety-nine million, three hundred twelve thousand, eight hundred fifty-three".