399064955 has 8 divisors (see below), whose sum is σ = 481929072. Its totient is φ = 317217888.

The previous prime is 399064909. The next prime is 399064957. The reversal of 399064955 is 559460993.

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 399064955 - 2¹² = 399060859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399064957) 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, 253397 + ... + 254966.

It is an arithmetic number, because the mean of its divisors is an integer number (60241134).

Almost surely, 2^399064955 is an apocalyptic number.

399064955 is a deficient number, since it is larger than the sum of its proper divisors (82864117).

399064955 is a wasteful number, since it uses less digits than its factorization.

399064955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508525.

The product of its (nonzero) digits is 1312200, while the sum is 50.

The square root of 399064955 is about 19976.6101979290. The cubic root of 399064955 is about 736.2317292487.

The spelling of 399064955 in words is "three hundred ninety-nine million, sixty-four thousand, nine hundred fifty-five".