399313 has 8 divisors (see below), whose sum is σ = 429408. Its totient is φ = 369984.

The previous prime is 399283. The next prime is 399353. The reversal of 399313 is 313993.

It is a happy number.

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 399313 - 2⁵ = 399281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (399353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1270 + ... + 1552.

It is an arithmetic number, because the mean of its divisors is an integer number (53676).

2³⁹⁹³¹³ is an apocalyptic number.

It is an amenable number.

399313 is a deficient number, since it is larger than the sum of its proper divisors (30095).

399313 is a wasteful number, since it uses less digits than its factorization.

399313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383.

The product of its digits is 2187, while the sum is 28.

The square root of 399313 is about 631.9121774424. The cubic root of 399313 is about 73.6384236398.

The spelling of 399313 in words is "three hundred ninety-nine thousand, three hundred thirteen".