491363983 has 8 divisors (see below), whose sum is σ = 536202576. Its totient is φ = 446553600.

The previous prime is 491363969. The next prime is 491363987. The reversal of 491363983 is 389363194.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491363983 - 2²⁵ = 457809551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491363987) 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 in 7 ways as a sum of consecutive naturals, for example, 48303 + ... + 57583.

It is an arithmetic number, because the mean of its divisors is an integer number (67025322).

Almost surely, 2^491363983 is an apocalyptic number.

491363983 is a deficient number, since it is larger than the sum of its proper divisors (44838593).

491363983 is a wasteful number, since it uses less digits than its factorization.

491363983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14105.

The product of its digits is 419904, while the sum is 46.

The square root of 491363983 is about 22166.7314460206. The cubic root of 491363983 is about 789.1043542963.

The spelling of 491363983 in words is "four hundred ninety-one million, three hundred sixty-three thousand, nine hundred eighty-three".