398393313 has 4 divisors (see below), whose sum is σ = 531191088. Its totient is φ = 265595540.

The previous prime is 398393299. The next prime is 398393371. The reversal of 398393313 is 313393893.

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 a cyclic number.

It is not a de Polignac number, because 398393313 - 2⁸ = 398393057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (398393713) 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, 66398883 + ... + 66398888.

It is an arithmetic number, because the mean of its divisors is an integer number (132797772).

Almost surely, 2^398393313 is an apocalyptic number.

It is an amenable number.

398393313 is a deficient number, since it is larger than the sum of its proper divisors (132797775).

398393313 is a wasteful number, since it uses less digits than its factorization.

398393313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132797774.

The product of its digits is 157464, while the sum is 42.

The square root of 398393313 is about 19959.7924087401. The cubic root of 398393313 is about 735.8184616702.

The spelling of 398393313 in words is "three hundred ninety-eight million, three hundred ninety-three thousand, three hundred thirteen".