204682981 has 2 divisors, whose sum is σ = 204682982. Its totient is φ = 204682980.

The previous prime is 204682943. The next prime is 204682993. The reversal of 204682981 is 189286402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202806081 + 1876900 = 14241^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 204682981 - 2⁹ = 204682469 is a prime.

It is a super-2 number, since 2×204682981² = 83790245422092722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204682931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102341490 + 102341491.

It is an arithmetic number, because the mean of its divisors is an integer number (102341491).

Almost surely, 2^204682981 is an apocalyptic number.

It is an amenable number.

204682981 is a deficient number, since it is larger than the sum of its proper divisors (1).

204682981 is an equidigital number, since it uses as much as digits as its factorization.

204682981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 204682981 is about 14306.7459962075. The cubic root of 204682981 is about 589.3327523304.

The spelling of 204682981 in words is "two hundred four million, six hundred eighty-two thousand, nine hundred eighty-one".