204995893 has 2 divisors, whose sum is σ = 204995894. Its totient is φ = 204995892.

The previous prime is 204995887. The next prime is 204995981. The reversal of 204995893 is 398599402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180015889 + 24980004 = 13417^2 + 4998^2 .

It is a cyclic number.

It is not a de Polignac number, because 204995893 - 2⁹ = 204995381 is a prime.

It is a super-2 number, since 2×204995893² = 84046632293734898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204995863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102497946 + 102497947.

It is an arithmetic number, because the mean of its divisors is an integer number (102497947).

Almost surely, 2^204995893 is an apocalyptic number.

It is an amenable number.

204995893 is a deficient number, since it is larger than the sum of its proper divisors (1).

204995893 is an equidigital number, since it uses as much as digits as its factorization.

204995893 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 49.

The square root of 204995893 is about 14317.6776398968. The cubic root of 204995893 is about 589.6329163471.

The spelling of 204995893 in words is "two hundred four million, nine hundred ninety-five thousand, eight hundred ninety-three".