204291247 has 2 divisors, whose sum is σ = 204291248. Its totient is φ = 204291246.

The previous prime is 204291229. The next prime is 204291253. The reversal of 204291247 is 742192402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204291247 - 2¹¹ = 204289199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204291047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102145623 + 102145624.

It is an arithmetic number, because the mean of its divisors is an integer number (102145624).

Almost surely, 2^204291247 is an apocalyptic number.

204291247 is a deficient number, since it is larger than the sum of its proper divisors (1).

204291247 is an equidigital number, since it uses as much as digits as its factorization.

204291247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 204291247 is about 14293.0489049748. The cubic root of 204291247 is about 588.9565459798.

The spelling of 204291247 in words is "two hundred four million, two hundred ninety-one thousand, two hundred forty-seven".