804660491 has 2 divisors, whose sum is σ = 804660492. Its totient is φ = 804660490.

The previous prime is 804660463. The next prime is 804660499. The reversal of 804660491 is 194066408.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 804660491 - 2²² = 800466187 is a prime.

It is a super-2 number, since 2×804660491² = 1294957011552722162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (804660499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 402330245 + 402330246.

It is an arithmetic number, because the mean of its divisors is an integer number (402330246).

Almost surely, 2^804660491 is an apocalyptic number.

804660491 is a deficient number, since it is larger than the sum of its proper divisors (1).

804660491 is an equidigital number, since it uses as much as digits as its factorization.

804660491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 804660491 is about 28366.5382272846. The cubic root of 804660491 is about 930.1169510302.

The spelling of 804660491 in words is "eight hundred four million, six hundred sixty thousand, four hundred ninety-one".