491120983 has 4 divisors (see below), whose sum is σ = 491216688. Its totient is φ = 491025280.

The previous prime is 491120977. The next prime is 491120989. The reversal of 491120983 is 389021194.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (491120977) and next prime (491120989).

It is a cyclic number.

It is not a de Polignac number, because 491120983 - 2⁹ = 491120471 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 (491120989) 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 3 ways as a sum of consecutive naturals, for example, 39691 + ... + 50572.

It is an arithmetic number, because the mean of its divisors is an integer number (122804172).

Almost surely, 2^491120983 is an apocalyptic number.

491120983 is a deficient number, since it is larger than the sum of its proper divisors (95705).

491120983 is an equidigital number, since it uses as much as digits as its factorization.

491120983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95704.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 491120983 is about 22161.2495811946. The cubic root of 491120983 is about 788.9742511662.

The spelling of 491120983 in words is "four hundred ninety-one million, one hundred twenty thousand, nine hundred eighty-three".