204017491 has 2 divisors, whose sum is σ = 204017492. Its totient is φ = 204017490.

The previous prime is 204017467. The next prime is 204017501. The reversal of 204017491 is 194710402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204017491 - 2⁹ = 204016979 is a prime.

It is equal to p_11289061 and since 204017491 and 11289061 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (204017461) 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, 102008745 + 102008746.

It is an arithmetic number, because the mean of its divisors is an integer number (102008746).

Almost surely, 2^204017491 is an apocalyptic number.

204017491 is a deficient number, since it is larger than the sum of its proper divisors (1).

204017491 is an equidigital number, since it uses as much as digits as its factorization.

204017491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 204017491 is about 14283.4691514352. The cubic root of 204017491 is about 588.6933556213.

Adding to 204017491 its reverse (194710402), we get a palindrome (398727893).

The spelling of 204017491 in words is "two hundred four million, seventeen thousand, four hundred ninety-one".