399645327 has 8 divisors (see below), whose sum is σ = 545857200. Its totient is φ = 259931840.

The previous prime is 399645319. The next prime is 399645359. The reversal of 399645327 is 723546993.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 399645327 - 2³ = 399645319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399645377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1624452 + ... + 1624697.

It is an arithmetic number, because the mean of its divisors is an integer number (68232150).

Almost surely, 2^399645327 is an apocalyptic number.

399645327 is a deficient number, since it is larger than the sum of its proper divisors (146211873).

399645327 is a wasteful number, since it uses less digits than its factorization.

399645327 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249193.

The product of its digits is 1224720, while the sum is 48.

The square root of 399645327 is about 19991.1312086135. The cubic root of 399645327 is about 736.5884642478.

The spelling of 399645327 in words is "three hundred ninety-nine million, six hundred forty-five thousand, three hundred twenty-seven".