399094309 has 8 divisors (see below), whose sum is σ = 410522112. Its totient is φ = 387764160.

The previous prime is 399094307. The next prime is 399094331. The reversal of 399094309 is 903490993.

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 399094309 - 2¹ = 399094307 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 (399094307) 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, 16084 + ... + 32509.

It is an arithmetic number, because the mean of its divisors is an integer number (51315264).

Almost surely, 2^399094309 is an apocalyptic number.

It is an amenable number.

399094309 is a deficient number, since it is larger than the sum of its proper divisors (11427803).

399094309 is a wasteful number, since it uses less digits than its factorization.

399094309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48827.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 399094309 is about 19977.3448936539. The cubic root of 399094309 is about 736.2497804591.

The spelling of 399094309 in words is "three hundred ninety-nine million, ninety-four thousand, three hundred nine".