203931393 has 16 divisors (see below), whose sum is σ = 283514880. Its totient is φ = 130225536.

The previous prime is 203931379. The next prime is 203931397. The reversal of 203931393 is 393139302.

It is a happy number.

203931393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203931393 - 2¹³ = 203923201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203931397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821 + ... + 20277.

It is an arithmetic number, because the mean of its divisors is an integer number (17719680).

Almost surely, 2^203931393 is an apocalyptic number.

It is an amenable number.

203931393 is a deficient number, since it is larger than the sum of its proper divisors (79583487).

203931393 is a wasteful number, since it uses less digits than its factorization.

203931393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18616.

The product of its (nonzero) digits is 13122, while the sum is 33.

The square root of 203931393 is about 14280.4549297283. The cubic root of 203931393 is about 588.6105319184.

The spelling of 203931393 in words is "two hundred three million, nine hundred thirty-one thousand, three hundred ninety-three".