203994133 has 4 divisors (see below), whose sum is σ = 233136160. Its totient is φ = 174852108.

The previous prime is 203994071. The next prime is 203994137. The reversal of 203994133 is 331499302.

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-203994133 is a prime.

It is a super-2 number, since 2×203994133² = 83227212596843378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203994137) 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 3 ways as a sum of consecutive naturals, for example, 14571003 + ... + 14571016.

It is an arithmetic number, because the mean of its divisors is an integer number (58284040).

Almost surely, 2^203994133 is an apocalyptic number.

It is an amenable number.

203994133 is a deficient number, since it is larger than the sum of its proper divisors (29142027).

203994133 is an equidigital number, since it uses as much as digits as its factorization.

203994133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29142026.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 203994133 is about 14282.6514695276. The cubic root of 203994133 is about 588.6708882270.

The spelling of 203994133 in words is "two hundred three million, nine hundred ninety-four thousand, one hundred thirty-three".