204953261 has 2 divisors, whose sum is σ = 204953262. Its totient is φ = 204953260.

The previous prime is 204953213. The next prime is 204953263. The reversal of 204953261 is 162359402.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183738025 + 21215236 = 13555^2 + 4606^2 .

It is a cyclic number.

It is not a de Polignac number, because 204953261 - 2¹⁸ = 204691117 is a prime.

Together with 204953263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204953263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102476630 + 102476631.

It is an arithmetic number, because the mean of its divisors is an integer number (102476631).

Almost surely, 2^204953261 is an apocalyptic number.

It is an amenable number.

204953261 is a deficient number, since it is larger than the sum of its proper divisors (1).

204953261 is an equidigital number, since it uses as much as digits as its factorization.

204953261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 204953261 is about 14316.1887735528. The cubic root of 204953261 is about 589.5920391489.

The spelling of 204953261 in words is "two hundred four million, nine hundred fifty-three thousand, two hundred sixty-one".