491222267 has 2 divisors, whose sum is σ = 491222268. Its totient is φ = 491222266.

The previous prime is 491222261. The next prime is 491222297. The reversal of 491222267 is 762222194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491222267 - 2¹⁰ = 491221243 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491222261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245611133 + 245611134.

It is an arithmetic number, because the mean of its divisors is an integer number (245611134).

Almost surely, 2^491222267 is an apocalyptic number.

491222267 is a deficient number, since it is larger than the sum of its proper divisors (1).

491222267 is an equidigital number, since it uses as much as digits as its factorization.

491222267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 35.

The square root of 491222267 is about 22163.5346233402. The cubic root of 491222267 is about 789.0284842222.

The spelling of 491222267 in words is "four hundred ninety-one million, two hundred twenty-two thousand, two hundred sixty-seven".