491865283 has 12 divisors (see below), whose sum is σ = 616183680. Its totient is φ = 389167632.

The previous prime is 491865263. The next prime is 491865289. The reversal of 491865283 is 382568194.

It is not a de Polignac number, because 491865283 - 2⁹ = 491864771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491865289) 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 in 11 ways as a sum of consecutive naturals, for example, 385443 + ... + 386716.

It is an arithmetic number, because the mean of its divisors is an integer number (51348640).

Almost surely, 2^491865283 is an apocalyptic number.

491865283 is a deficient number, since it is larger than the sum of its proper divisors (124318397).

491865283 is a wasteful number, since it uses less digits than its factorization.

491865283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772186 (or 772179 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 491865283 is about 22178.0360492087. The cubic root of 491865283 is about 789.3726167772.

The spelling of 491865283 in words is "four hundred ninety-one million, eight hundred sixty-five thousand, two hundred eighty-three".