399899 has 2 divisors, whose sum is σ = 399900. Its totient is φ = 399898.

The previous prime is 399887. The next prime is 399911. The reversal of 399899 is 998993.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (399887) and next prime (399911).

It is a cyclic number.

It is not a de Polignac number, because 399899 - 2⁸ = 399643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (399499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199949 + 199950.

It is an arithmetic number, because the mean of its divisors is an integer number (199950).

2³⁹⁹⁸⁹⁹ is an apocalyptic number.

399899 is a deficient number, since it is larger than the sum of its proper divisors (1).

399899 is an equidigital number, since it uses as much as digits as its factorization.

399899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157464, while the sum is 47.

The square root of 399899 is about 632.3756794817. The cubic root of 399899 is about 73.6744279978.

The spelling of 399899 in words is "three hundred ninety-nine thousand, eight hundred ninety-nine".