491824243 has 2 divisors, whose sum is σ = 491824244. Its totient is φ = 491824242.

The previous prime is 491824213. The next prime is 491824261. The reversal of 491824243 is 342428194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491824243 - 2⁵ = 491824211 is a prime.

It is not a weakly prime, because it can be changed into another prime (491824213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245912121 + 245912122.

It is an arithmetic number, because the mean of its divisors is an integer number (245912122).

Almost surely, 2^491824243 is an apocalyptic number.

491824243 is a deficient number, since it is larger than the sum of its proper divisors (1).

491824243 is an equidigital number, since it uses as much as digits as its factorization.

491824243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55296, while the sum is 37.

The square root of 491824243 is about 22177.1107901818. The cubic root of 491824243 is about 789.3506617458.

It can be divided in two parts, 4918 and 24243, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 491824243 in words is "four hundred ninety-one million, eight hundred twenty-four thousand, two hundred forty-three".