204983173 has 2 divisors, whose sum is σ = 204983174. Its totient is φ = 204983172.

The previous prime is 204983137. The next prime is 204983179. The reversal of 204983173 is 371389402.

Together with previous prime (204983137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201441249 + 3541924 = 14193^2 + 1882^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204983173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204983179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102491586 + 102491587.

It is an arithmetic number, because the mean of its divisors is an integer number (102491587).

Almost surely, 2^204983173 is an apocalyptic number.

It is an amenable number.

204983173 is a deficient number, since it is larger than the sum of its proper divisors (1).

204983173 is an equidigital number, since it uses as much as digits as its factorization.

204983173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 204983173 is about 14317.2334268880. The cubic root of 204983173 is about 589.6207205160.

The spelling of 204983173 in words is "two hundred four million, nine hundred eighty-three thousand, one hundred seventy-three".