204203613 has 4 divisors (see below), whose sum is σ = 272271488. Its totient is φ = 136135740.

The previous prime is 204203581. The next prime is 204203617. The reversal of 204203613 is 316302402.

It is a happy number.

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 not a de Polignac number, because 204203613 - 2⁵ = 204203581 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204203613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204203617) 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, 34033933 + ... + 34033938.

It is an arithmetic number, because the mean of its divisors is an integer number (68067872).

Almost surely, 2^204203613 is an apocalyptic number.

It is an amenable number.

204203613 is a deficient number, since it is larger than the sum of its proper divisors (68067875).

204203613 is an equidigital number, since it uses as much as digits as its factorization.

204203613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68067874.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 204203613 is about 14289.9829601018. The cubic root of 204203613 is about 588.8723198231.

The spelling of 204203613 in words is "two hundred four million, two hundred three thousand, six hundred thirteen".