204863081 has 2 divisors, whose sum is σ = 204863082. Its totient is φ = 204863080.

The previous prime is 204863077. The next prime is 204863201. The reversal of 204863081 is 180368402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204747481 + 115600 = 14309^2 + 340^2 .

It is a cyclic number.

It is not a de Polignac number, because 204863081 - 2² = 204863077 is a prime.

It is a super-2 number, since 2×204863081² = 83937763913625122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (204863381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102431540 + 102431541.

It is an arithmetic number, because the mean of its divisors is an integer number (102431541).

Almost surely, 2^204863081 is an apocalyptic number.

It is an amenable number.

204863081 is a deficient number, since it is larger than the sum of its proper divisors (1).

204863081 is an equidigital number, since it uses as much as digits as its factorization.

204863081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 204863081 is about 14313.0388457518. The cubic root of 204863081 is about 589.5055524218.

The spelling of 204863081 in words is "two hundred four million, eight hundred sixty-three thousand, eighty-one".