204952991 has 2 divisors, whose sum is σ = 204952992. Its totient is φ = 204952990.

The previous prime is 204952987. The next prime is 204953011. The reversal of 204952991 is 199259402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204952991 - 2² = 204952987 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 (204952291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102476495 + 102476496.

It is an arithmetic number, because the mean of its divisors is an integer number (102476496).

Almost surely, 2^204952991 is an apocalyptic number.

204952991 is a deficient number, since it is larger than the sum of its proper divisors (1).

204952991 is an equidigital number, since it uses as much as digits as its factorization.

204952991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 204952991 is about 14316.1793436657. The cubic root of 204952991 is about 589.5917802444.

The spelling of 204952991 in words is "two hundred four million, nine hundred fifty-two thousand, nine hundred ninety-one".