491922243 has 6 divisors (see below), whose sum is σ = 710554364. Its totient is φ = 327948156.

The previous prime is 491922227. The next prime is 491922247. The reversal of 491922243 is 342229194.

It is not a de Polignac number, because 491922243 - 2⁴ = 491922227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491922198 and 491922207.

It is not an unprimeable number, because it can be changed into a prime (491922247) 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 5 ways as a sum of consecutive naturals, for example, 27329005 + ... + 27329022.

Almost surely, 2^491922243 is an apocalyptic number.

491922243 is a deficient number, since it is larger than the sum of its proper divisors (218632121).

491922243 is a wasteful number, since it uses less digits than its factorization.

491922243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54658033 (or 54658030 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 491922243 is about 22179.3201654154. The cubic root of 491922243 is about 789.4030864541.

The spelling of 491922243 in words is "four hundred ninety-one million, nine hundred twenty-two thousand, two hundred forty-three".