399822899 has 6 divisors (see below), whose sum is σ = 465100164. Its totient is φ = 342705300.

The previous prime is 399822877. The next prime is 399822911. The reversal of 399822899 is 998228993.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-399822899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399822809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4079777 + ... + 4079874.

It is an arithmetic number, because the mean of its divisors is an integer number (77516694).

Almost surely, 2^399822899 is an apocalyptic number.

399822899 is a deficient number, since it is larger than the sum of its proper divisors (65277265).

399822899 is an equidigital number, since it uses as much as digits as its factorization.

399822899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8159665 (or 8159658 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 59.

The square root of 399822899 is about 19995.5719848170. The cubic root of 399822899 is about 736.6975427319.

The spelling of 399822899 in words is "three hundred ninety-nine million, eight hundred twenty-two thousand, eight hundred ninety-nine".