399608373 has 4 divisors (see below), whose sum is σ = 532811168. Its totient is φ = 266405580.

The previous prime is 399608359. The next prime is 399608381. The reversal of 399608373 is 373806993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 399608373 - 2⁸ = 399608117 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 (399608353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66601393 + ... + 66601398.

It is an arithmetic number, because the mean of its divisors is an integer number (133202792).

Almost surely, 2^399608373 is an apocalyptic number.

It is an amenable number.

399608373 is a deficient number, since it is larger than the sum of its proper divisors (133202795).

399608373 is a wasteful number, since it uses less digits than its factorization.

399608373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133202794.

The product of its (nonzero) digits is 734832, while the sum is 48.

The square root of 399608373 is about 19990.2069273932. The cubic root of 399608373 is about 736.5657601756.

The spelling of 399608373 in words is "three hundred ninety-nine million, six hundred eight thousand, three hundred seventy-three".