204985297 has 4 divisors (see below), whose sum is σ = 223620336. Its totient is φ = 186350260.

The previous prime is 204985289. The next prime is 204985309. The reversal of 204985297 is 792589402.

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 204985297 - 2³ = 204985289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204985247) 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, 9317503 + ... + 9317524.

It is an arithmetic number, because the mean of its divisors is an integer number (55905084).

Almost surely, 2^204985297 is an apocalyptic number.

It is an amenable number.

204985297 is a deficient number, since it is larger than the sum of its proper divisors (18635039).

204985297 is a wasteful number, since it uses less digits than its factorization.

204985297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18635038.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 204985297 is about 14317.3076030377. The cubic root of 204985297 is about 589.6227570248.

The spelling of 204985297 in words is "two hundred four million, nine hundred eighty-five thousand, two hundred ninety-seven".