399713297 has 8 divisors (see below), whose sum is σ = 423931200. Its totient is φ = 376065360.

The previous prime is 399713273. The next prime is 399713311. The reversal of 399713297 is 792317993.

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

It is a cyclic number.

It is not a de Polignac number, because 399713297 - 2¹⁶ = 399647761 is a prime.

It is a super-2 number, since 2×399713297² = 319541439597220418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399713267) 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 7 ways as a sum of consecutive naturals, for example, 141047 + ... + 143852.

It is an arithmetic number, because the mean of its divisors is an integer number (52991400).

Almost surely, 2^399713297 is an apocalyptic number.

It is an amenable number.

399713297 is a deficient number, since it is larger than the sum of its proper divisors (24217903).

399713297 is a wasteful number, since it uses less digits than its factorization.

399713297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284983.

The product of its digits is 642978, while the sum is 50.

The square root of 399713297 is about 19992.8311401862. The cubic root of 399713297 is about 736.6302205055.

The spelling of 399713297 in words is "three hundred ninety-nine million, seven hundred thirteen thousand, two hundred ninety-seven".