491217359 has 2 divisors, whose sum is σ = 491217360. Its totient is φ = 491217358.

The previous prime is 491217343. The next prime is 491217367. The reversal of 491217359 is 953712194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491217359 - 2⁴ = 491217343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491217319) 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 as a sum of consecutive naturals, namely, 245608679 + 245608680.

It is an arithmetic number, because the mean of its divisors is an integer number (245608680).

Almost surely, 2^491217359 is an apocalyptic number.

491217359 is a deficient number, since it is larger than the sum of its proper divisors (1).

491217359 is an equidigital number, since it uses as much as digits as its factorization.

491217359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 41.

The square root of 491217359 is about 22163.4239006522. The cubic root of 491217359 is about 789.0258563794.

The spelling of 491217359 in words is "four hundred ninety-one million, two hundred seventeen thousand, three hundred fifty-nine".