491148719 has 2 divisors, whose sum is σ = 491148720. Its totient is φ = 491148718.

The previous prime is 491148703. The next prime is 491148761. The reversal of 491148719 is 917841194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491148719 - 2⁴ = 491148703 is a prime.

It is a super-2 number, since 2×491148719² = 482454128350681922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491148719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491148769) 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, 245574359 + 245574360.

It is an arithmetic number, because the mean of its divisors is an integer number (245574360).

Almost surely, 2^491148719 is an apocalyptic number.

491148719 is a deficient number, since it is larger than the sum of its proper divisors (1).

491148719 is an equidigital number, since it uses as much as digits as its factorization.

491148719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 44.

The square root of 491148719 is about 22161.8753493471. The cubic root of 491148719 is about 788.9891032961.

The spelling of 491148719 in words is "four hundred ninety-one million, one hundred forty-eight thousand, seven hundred nineteen".