491233417 has 2 divisors, whose sum is σ = 491233418. Its totient is φ = 491233416.

The previous prime is 491233403. The next prime is 491233439. The reversal of 491233417 is 714332194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 445589881 + 45643536 = 21109^2 + 6756^2 .

It is a cyclic number.

It is not a de Polignac number, because 491233417 - 2⁷ = 491233289 is a prime.

It is not a weakly prime, because it can be changed into another prime (491233217) 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, 245616708 + 245616709.

It is an arithmetic number, because the mean of its divisors is an integer number (245616709).

Almost surely, 2^491233417 is an apocalyptic number.

It is an amenable number.

491233417 is a deficient number, since it is larger than the sum of its proper divisors (1).

491233417 is an equidigital number, since it uses as much as digits as its factorization.

491233417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 491233417 is about 22163.7861612135. The cubic root of 491233417 is about 789.0344540935.

The spelling of 491233417 in words is "four hundred ninety-one million, two hundred thirty-three thousand, four hundred seventeen".