491234519 has 2 divisors, whose sum is σ = 491234520. Its totient is φ = 491234518.

The previous prime is 491234473. The next prime is 491234563. The reversal of 491234519 is 915432194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491234519 - 2¹² = 491230423 is a prime.

It is a super-2 number, since 2×491234519² = 482622705314322722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491234119) 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, 245617259 + 245617260.

It is an arithmetic number, because the mean of its divisors is an integer number (245617260).

Almost surely, 2^491234519 is an apocalyptic number.

491234519 is a deficient number, since it is larger than the sum of its proper divisors (1).

491234519 is an equidigital number, since it uses as much as digits as its factorization.

491234519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 38.

The square root of 491234519 is about 22163.8110215730. The cubic root of 491234519 is about 789.0350441153.

The spelling of 491234519 in words is "four hundred ninety-one million, two hundred thirty-four thousand, five hundred nineteen".