399314837 has 2 divisors, whose sum is σ = 399314838. Its totient is φ = 399314836.

The previous prime is 399314831. The next prime is 399314897. The reversal of 399314837 is 738413993.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396248836 + 3066001 = 19906^2 + 1751^2 .

It is a cyclic number.

It is not a de Polignac number, because 399314837 - 2⁴ = 399314821 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 399314791 and 399314800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399314831) 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, 199657418 + 199657419.

It is an arithmetic number, because the mean of its divisors is an integer number (199657419).

Almost surely, 2^399314837 is an apocalyptic number.

It is an amenable number.

399314837 is a deficient number, since it is larger than the sum of its proper divisors (1).

399314837 is an equidigital number, since it uses as much as digits as its factorization.

399314837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 47.

The square root of 399314837 is about 19982.8635835808. The cubic root of 399314837 is about 736.3853656172.

The spelling of 399314837 in words is "three hundred ninety-nine million, three hundred fourteen thousand, eight hundred thirty-seven".