399919327 has 2 divisors, whose sum is σ = 399919328. Its totient is φ = 399919326.

The previous prime is 399919321. The next prime is 399919363. The reversal of 399919327 is 723919993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399919327 - 2²⁷ = 265701599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399919321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199959663 + 199959664.

It is an arithmetic number, because the mean of its divisors is an integer number (199959664).

Almost surely, 2^399919327 is an apocalyptic number.

399919327 is a deficient number, since it is larger than the sum of its proper divisors (1).

399919327 is an equidigital number, since it uses as much as digits as its factorization.

399919327 is an evil number, because the sum of its binary digits is even.

The product of its digits is 826686, while the sum is 52.

The square root of 399919327 is about 19997.9830733002. The cubic root of 399919327 is about 736.7567627522.

The spelling of 399919327 in words is "three hundred ninety-nine million, nine hundred nineteen thousand, three hundred twenty-seven".