398320093 has 4 divisors (see below), whose sum is σ = 398647008. Its totient is φ = 397993180.

The previous prime is 398320079. The next prime is 398320099. The reversal of 398320093 is 390023893.

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 a de Polignac number, because none of the positive numbers 2^k-398320093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398320099) 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, 161623 + ... + 164068.

It is an arithmetic number, because the mean of its divisors is an integer number (99661752).

Almost surely, 2^398320093 is an apocalyptic number.

It is an amenable number.

398320093 is a deficient number, since it is larger than the sum of its proper divisors (326915).

398320093 is a wasteful number, since it uses less digits than its factorization.

398320093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326914.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 398320093 is about 19957.9581370440. The cubic root of 398320093 is about 735.7733806519.

The spelling of 398320093 in words is "three hundred ninety-eight million, three hundred twenty thousand, ninety-three".