204961117 has 2 divisors, whose sum is σ = 204961118. Its totient is φ = 204961116.

The previous prime is 204961111. The next prime is 204961147. The reversal of 204961117 is 711169402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190053796 + 14907321 = 13786^2 + 3861^2 .

It is a cyclic number.

It is not a de Polignac number, because 204961117 - 2⁷ = 204960989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204961111) 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, 102480558 + 102480559.

It is an arithmetic number, because the mean of its divisors is an integer number (102480559).

Almost surely, 2^204961117 is an apocalyptic number.

It is an amenable number.

204961117 is a deficient number, since it is larger than the sum of its proper divisors (1).

204961117 is an equidigital number, since it uses as much as digits as its factorization.

204961117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 204961117 is about 14316.4631456236. The cubic root of 204961117 is about 589.5995722093.

The spelling of 204961117 in words is "two hundred four million, nine hundred sixty-one thousand, one hundred seventeen".