204891461 has 2 divisors, whose sum is σ = 204891462. Its totient is φ = 204891460.

The previous prime is 204891403. The next prime is 204891499. The reversal of 204891461 is 164198402.

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., 202350625 + 2540836 = 14225^2 + 1594^2 .

It is a cyclic number.

It is not a de Polignac number, because 204891461 - 2¹⁸ = 204629317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204897461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102445730 + 102445731.

It is an arithmetic number, because the mean of its divisors is an integer number (102445731).

Almost surely, 2^204891461 is an apocalyptic number.

It is an amenable number.

204891461 is a deficient number, since it is larger than the sum of its proper divisors (1).

204891461 is an equidigital number, since it uses as much as digits as its factorization.

204891461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 204891461 is about 14314.0302151421. The cubic root of 204891461 is about 589.5327728707.

The spelling of 204891461 in words is "two hundred four million, eight hundred ninety-one thousand, four hundred sixty-one".