204425787 has 4 divisors (see below), whose sum is σ = 272567720. Its totient is φ = 136283856.

The previous prime is 204425773. The next prime is 204425789. The reversal of 204425787 is 787524402.

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

It is not a de Polignac number, because 204425787 - 2¹⁸ = 204163643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204425789) 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, 34070962 + ... + 34070967.

It is an arithmetic number, because the mean of its divisors is an integer number (68141930).

Almost surely, 2^204425787 is an apocalyptic number.

204425787 is a deficient number, since it is larger than the sum of its proper divisors (68141933).

204425787 is an equidigital number, since it uses as much as digits as its factorization.

204425787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68141932.

The product of its (nonzero) digits is 125440, while the sum is 39.

The square root of 204425787 is about 14297.7546139245. The cubic root of 204425787 is about 589.0858072291.

The spelling of 204425787 in words is "two hundred four million, four hundred twenty-five thousand, seven hundred eighty-seven".