203431393 has 8 divisors (see below), whose sum is σ = 229084416. Its totient is φ = 178971600.

The previous prime is 203431379. The next prime is 203431411. The reversal of 203431393 is 393134302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203431393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (203431093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297946 + ... + 298627.

It is an arithmetic number, because the mean of its divisors is an integer number (28635552).

Almost surely, 2^203431393 is an apocalyptic number.

It is an amenable number.

203431393 is a deficient number, since it is larger than the sum of its proper divisors (25653023).

203431393 is a wasteful number, since it uses less digits than its factorization.

203431393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596615.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 203431393 is about 14262.9377408723. The cubic root of 203431393 is about 588.1290854931.

Adding to 203431393 its reverse (393134302), we get a palindrome (596565695).

It can be divided in two parts, 20343 and 1393, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 203431393 in words is "two hundred three million, four hundred thirty-one thousand, three hundred ninety-three".