399360909 has 8 divisors (see below), whose sum is σ = 544864672. Its totient is φ = 260048880.

The previous prime is 399360901. The next prime is 399360947. The reversal of 399360909 is 909063993.

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

It is not a de Polignac number, because 399360909 - 2³ = 399360901 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 (399360901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1547782 + ... + 1548039.

It is an arithmetic number, because the mean of its divisors is an integer number (68108084).

Almost surely, 2^399360909 is an apocalyptic number.

It is an amenable number.

399360909 is a deficient number, since it is larger than the sum of its proper divisors (145503763).

399360909 is a wasteful number, since it uses less digits than its factorization.

399360909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095867.

The product of its (nonzero) digits is 354294, while the sum is 48.

The square root of 399360909 is about 19984.0163380638. The cubic root of 399360909 is about 736.4136853278.

The spelling of 399360909 in words is "three hundred ninety-nine million, three hundred sixty thousand, nine hundred nine".