399246299 has 2 divisors, whose sum is σ = 399246300. Its totient is φ = 399246298.

The previous prime is 399246283. The next prime is 399246301. The reversal of 399246299 is 992642993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399246299 - 2⁴ = 399246283 is a prime.

It is a Sophie Germain prime.

Together with 399246301, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399246299.

It is not a weakly prime, because it can be changed into another prime (399246229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199623149 + 199623150.

It is an arithmetic number, because the mean of its divisors is an integer number (199623150).

Almost surely, 2^399246299 is an apocalyptic number.

399246299 is a deficient number, since it is larger than the sum of its proper divisors (1).

399246299 is an equidigital number, since it uses as much as digits as its factorization.

399246299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 53.

The square root of 399246299 is about 19981.1485906091. The cubic root of 399246299 is about 736.3432323902.

The spelling of 399246299 in words is "three hundred ninety-nine million, two hundred forty-six thousand, two hundred ninety-nine".