204680491 has 2 divisors, whose sum is σ = 204680492. Its totient is φ = 204680490.

The previous prime is 204680477. The next prime is 204680513. The reversal of 204680491 is 194086402.

204680491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204680491 - 2²³ = 196291883 is a prime.

It is not a weakly prime, because it can be changed into another prime (204680431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102340245 + 102340246.

It is an arithmetic number, because the mean of its divisors is an integer number (102340246).

Almost surely, 2^204680491 is an apocalyptic number.

204680491 is a deficient number, since it is larger than the sum of its proper divisors (1).

204680491 is an equidigital number, since it uses as much as digits as its factorization.

204680491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 204680491 is about 14306.6589740582. The cubic root of 204680491 is about 589.3303625461.

The spelling of 204680491 in words is "two hundred four million, six hundred eighty thousand, four hundred ninety-one".