399047373 has 12 divisors (see below), whose sum is σ = 577668988. Its totient is φ = 265446720.

The previous prime is 399047359. The next prime is 399047381. The reversal of 399047373 is 373740993.

It can be written as a sum of positive squares in 2 ways, for example, as 207446409 + 191600964 = 14403^2 + 13842^2 .

It is not a de Polignac number, because 399047373 - 2⁹ = 399046861 is a prime.

It is a super-2 number, since 2×399047373² = 318477611796402258, which contains 22 as substring.

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 (399047333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44398 + ... + 52623.

Almost surely, 2^399047373 is an apocalyptic number.

It is an amenable number.

399047373 is a deficient number, since it is larger than the sum of its proper divisors (178621615).

399047373 is a wasteful number, since it uses less digits than its factorization.

399047373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97484 (or 97481 counting only the distinct ones).

The product of its (nonzero) digits is 428652, while the sum is 45.

The square root of 399047373 is about 19976.1701284305. The cubic root of 399047373 is about 736.2209167931.

The spelling of 399047373 in words is "three hundred ninety-nine million, forty-seven thousand, three hundred seventy-three".