320203393 has 4 divisors (see below), whose sum is σ = 320302080. Its totient is φ = 320104708.

The previous prime is 320203391. The next prime is 320203441. The reversal of 320203393 is 393302023.

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 320203393 - 2¹ = 320203391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320203391) 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 3 ways as a sum of consecutive naturals, for example, 44305 + ... + 51022.

It is an arithmetic number, because the mean of its divisors is an integer number (80075520).

Almost surely, 2^320203393 is an apocalyptic number.

It is an amenable number.

320203393 is a deficient number, since it is larger than the sum of its proper divisors (98687).

320203393 is an equidigital number, since it uses as much as digits as its factorization.

320203393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98686.

The product of its (nonzero) digits is 2916, while the sum is 25.

The square root of 320203393 is about 17894.2279241101. The cubic root of 320203393 is about 684.1352634527.

The spelling of 320203393 in words is "three hundred twenty million, two hundred three thousand, three hundred ninety-three".