203172393 has 8 divisors (see below), whose sum is σ = 274712256. Its totient is φ = 133540400.

The previous prime is 203172391. The next prime is 203172407. The reversal of 203172393 is 393271302.

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

It is a cyclic number.

It is not a de Polignac number, because 203172393 - 2¹ = 203172391 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 203172393.

It is not an unprimeable number, because it can be changed into a prime (203172391) 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, 476718 + ... + 477143.

It is an arithmetic number, because the mean of its divisors is an integer number (34339032).

Almost surely, 2^203172393 is an apocalyptic number.

It is an amenable number.

203172393 is a deficient number, since it is larger than the sum of its proper divisors (71539863).

203172393 is an equidigital number, since it uses as much as digits as its factorization.

203172393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953935.

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 203172393 is about 14253.8553731964. The cubic root of 203172393 is about 587.8793860386.

The spelling of 203172393 in words is "two hundred three million, one hundred seventy-two thousand, three hundred ninety-three".