204945087 has 4 divisors (see below), whose sum is σ = 273260120. Its totient is φ = 136630056.

The previous prime is 204945079. The next prime is 204945089. The reversal of 204945087 is 780549402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204945087 - 2³ = 204945079 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 (204945089) 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, 34157512 + ... + 34157517.

It is an arithmetic number, because the mean of its divisors is an integer number (68315030).

Almost surely, 2^204945087 is an apocalyptic number.

204945087 is a deficient number, since it is larger than the sum of its proper divisors (68315033).

204945087 is an equidigital number, since it uses as much as digits as its factorization.

204945087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68315032.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 204945087 is about 14315.9032896985. The cubic root of 204945087 is about 589.5842009563.

The spelling of 204945087 in words is "two hundred four million, nine hundred forty-five thousand, eighty-seven".