204690249 has 27 divisors (see below), whose sum is σ = 313292109. Its totient is φ = 128763000.

The previous prime is 204690247. The next prime is 204690257. The reversal of 204690249 is 942096402.

The square root of 204690249 is 14307.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 204690249 - 2¹ = 204690247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204690247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 815374 + ... + 815624.

Almost surely, 2^204690249 is an apocalyptic number.

204690249 is the 14307-th square number.

204690249 is the 7154-th centered octagonal number.

It is an amenable number.

204690249 is a deficient number, since it is larger than the sum of its proper divisors (108601860).

204690249 is an equidigital number, since it uses as much as digits as its factorization.

204690249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The cubic root of 204690249 is about 589.3397277023.

Multiplying 204690249 by its sum of digits (36), we get a square (7368848964 = 85842²).

The spelling of 204690249 in words is "two hundred four million, six hundred ninety thousand, two hundred forty-nine".