203240189 has 4 divisors (see below), whose sum is σ = 203278656. Its totient is φ = 203201724.

The previous prime is 203240183. The next prime is 203240221. The reversal of 203240189 is 981042302.

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 203240189 - 2²⁴ = 186462973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203240183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9749 + ... + 22394.

It is an arithmetic number, because the mean of its divisors is an integer number (50819664).

Almost surely, 2^203240189 is an apocalyptic number.

It is an amenable number.

203240189 is a deficient number, since it is larger than the sum of its proper divisors (38467).

203240189 is an equidigital number, since it uses as much as digits as its factorization.

203240189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38466.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 203240189 is about 14256.2333384383. The cubic root of 203240189 is about 587.9447680162.

The spelling of 203240189 in words is "two hundred three million, two hundred forty thousand, one hundred eighty-nine".