491603579 has 2 divisors, whose sum is σ = 491603580. Its totient is φ = 491603578.

The previous prime is 491603573. The next prime is 491603627. The reversal of 491603579 is 975306194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491603579 - 2¹⁶ = 491538043 is a prime.

It is not a weakly prime, because it can be changed into another prime (491603573) 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, 245801789 + 245801790.

It is an arithmetic number, because the mean of its divisors is an integer number (245801790).

Almost surely, 2^491603579 is an apocalyptic number.

491603579 is a deficient number, since it is larger than the sum of its proper divisors (1).

491603579 is an equidigital number, since it uses as much as digits as its factorization.

491603579 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 491603579 is about 22172.1351926241. The cubic root of 491603579 is about 789.2325929214.

The spelling of 491603579 in words is "four hundred ninety-one million, six hundred three thousand, five hundred seventy-nine".