204240791 has 2 divisors, whose sum is σ = 204240792. Its totient is φ = 204240790.

The previous prime is 204240767. The next prime is 204240809. The reversal of 204240791 is 197042402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204240791 - 2¹⁸ = 203978647 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204240191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102120395 + 102120396.

It is an arithmetic number, because the mean of its divisors is an integer number (102120396).

Almost surely, 2^204240791 is an apocalyptic number.

204240791 is a deficient number, since it is larger than the sum of its proper divisors (1).

204240791 is an equidigital number, since it uses as much as digits as its factorization.

204240791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 204240791 is about 14291.2837421975. The cubic root of 204240791 is about 588.9080550161.

The spelling of 204240791 in words is "two hundred four million, two hundred forty thousand, seven hundred ninety-one".