204961111 has 2 divisors, whose sum is σ = 204961112. Its totient is φ = 204961110.

The previous prime is 204961079. The next prime is 204961117. The reversal of 204961111 is 111169402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204961111 - 2⁵ = 204961079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204961117) 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, 102480555 + 102480556.

It is an arithmetic number, because the mean of its divisors is an integer number (102480556).

Almost surely, 2^204961111 is an apocalyptic number.

204961111 is a deficient number, since it is larger than the sum of its proper divisors (1).

204961111 is an equidigital number, since it uses as much as digits as its factorization.

204961111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 204961111 is about 14316.4629360747. The cubic root of 204961111 is about 589.5995664560.

The spelling of 204961111 in words is "two hundred four million, nine hundred sixty-one thousand, one hundred eleven".