204690657 has 8 divisors (see below), whose sum is σ = 276765120. Its totient is φ = 134538320.

The previous prime is 204690653. The next prime is 204690701. The reversal of 204690657 is 756096402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204690657 - 2² = 204690653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204690653) 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 7 ways as a sum of consecutive naturals, for example, 480282 + ... + 480707.

It is an arithmetic number, because the mean of its divisors is an integer number (34595640).

Almost surely, 2^204690657 is an apocalyptic number.

It is an amenable number.

204690657 is a deficient number, since it is larger than the sum of its proper divisors (72074463).

204690657 is an equidigital number, since it uses as much as digits as its factorization.

204690657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 961063.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 204690657 is about 14307.0142587474. The cubic root of 204690657 is about 589.3401192703.

The spelling of 204690657 in words is "two hundred four million, six hundred ninety thousand, six hundred fifty-seven".