399707373 has 16 divisors (see below), whose sum is σ = 581208320. Its totient is φ = 242858304.

The previous prime is 399707323. The next prime is 399707387. The reversal of 399707373 is 373707993.

It is not a de Polignac number, because 399707373 - 2¹² = 399703277 is a prime.

It is a super-2 number, since 2×399707373² = 319531968061122258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399707323) 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 15 ways as a sum of consecutive naturals, for example, 61786 + ... + 67947.

It is an arithmetic number, because the mean of its divisors is an integer number (36325520).

Almost surely, 2^399707373 is an apocalyptic number.

It is an amenable number.

399707373 is a deficient number, since it is larger than the sum of its proper divisors (181500947).

399707373 is a wasteful number, since it uses less digits than its factorization.

399707373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129828.

The product of its (nonzero) digits is 750141, while the sum is 48.

The square root of 399707373 is about 19992.6829865328. The cubic root of 399707373 is about 736.6265813814.

The spelling of 399707373 in words is "three hundred ninety-nine million, seven hundred seven thousand, three hundred seventy-three".