399141913 has 2 divisors, whose sum is σ = 399141914. Its totient is φ = 399141912.

The previous prime is 399141901. The next prime is 399141943. The reversal of 399141913 is 319141993.

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., 256864729 + 142277184 = 16027^2 + 11928^2 .

It is a cyclic number.

It is not a de Polignac number, because 399141913 - 2⁹ = 399141401 is a prime.

It is not a weakly prime, because it can be changed into another prime (399141943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199570956 + 199570957.

It is an arithmetic number, because the mean of its divisors is an integer number (199570957).

Almost surely, 2^399141913 is an apocalyptic number.

It is an amenable number.

399141913 is a deficient number, since it is larger than the sum of its proper divisors (1).

399141913 is an equidigital number, since it uses as much as digits as its factorization.

399141913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 399141913 is about 19978.5363077479. The cubic root of 399141913 is about 736.2790526055.

The spelling of 399141913 in words is "three hundred ninety-nine million, one hundred forty-one thousand, nine hundred thirteen".