399004293 has 16 divisors (see below), whose sum is σ = 535294656. Its totient is φ = 264364800.

The previous prime is 399004279. The next prime is 399004303. The reversal of 399004293 is 392400993.

It is not a de Polignac number, because 399004293 - 2⁵ = 399004261 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399004213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 568843 + ... + 569543.

It is an arithmetic number, because the mean of its divisors is an integer number (33455916).

Almost surely, 2^399004293 is an apocalyptic number.

It is an amenable number.

399004293 is a deficient number, since it is larger than the sum of its proper divisors (136290363).

399004293 is a wasteful number, since it uses less digits than its factorization.

399004293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 52488, while the sum is 39.

The square root of 399004293 is about 19975.0918145574. The cubic root of 399004293 is about 736.1944224129.

The spelling of 399004293 in words is "three hundred ninety-nine million, four thousand, two hundred ninety-three".