491819353 has 2 divisors, whose sum is σ = 491819354. Its totient is φ = 491819352.

The previous prime is 491819261. The next prime is 491819359. The reversal of 491819353 is 353918194.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257025024 + 234794329 = 16032^2 + 15323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491819353 is a prime.

It is not a weakly prime, because it can be changed into another prime (491819359) 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 as a sum of consecutive naturals, namely, 245909676 + 245909677.

It is an arithmetic number, because the mean of its divisors is an integer number (245909677).

Almost surely, 2^491819353 is an apocalyptic number.

It is an amenable number.

491819353 is a deficient number, since it is larger than the sum of its proper divisors (1).

491819353 is an equidigital number, since it uses as much as digits as its factorization.

491819353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 43.

The square root of 491819353 is about 22177.0005411011. Note that the first 3 decimals coincide. The cubic root of 491819353 is about 789.3480456774.

The spelling of 491819353 in words is "four hundred ninety-one million, eight hundred nineteen thousand, three hundred fifty-three".