399149807 has 8 divisors (see below), whose sum is σ = 457631136. Its totient is φ = 341033472.

The previous prime is 399149789. The next prime is 399149813. The reversal of 399149807 is 708941993.

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 399149807 - 2⁸ = 399149551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399149867) 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, 88898 + ... + 93279.

It is an arithmetic number, because the mean of its divisors is an integer number (57203892).

Almost surely, 2^399149807 is an apocalyptic number.

399149807 is a deficient number, since it is larger than the sum of its proper divisors (58481329).

399149807 is a wasteful number, since it uses less digits than its factorization.

399149807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182497.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 399149807 is about 19978.7338687916. The cubic root of 399149807 is about 736.2839064752.

The spelling of 399149807 in words is "three hundred ninety-nine million, one hundred forty-nine thousand, eight hundred seven".