491284719 has 24 divisors (see below), whose sum is σ = 731792880. Its totient is φ = 317446272.

The previous prime is 491284697. The next prime is 491284733. The reversal of 491284719 is 917482194.

It is a happy number.

It is not a de Polignac number, because 491284719 - 2¹⁵ = 491251951 is a prime.

It is a super-2 number, since 2×491284719² = 482721350245817922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491284769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33387 + ... + 45795.

It is an arithmetic number, because the mean of its divisors is an integer number (30491370).

Almost surely, 2^491284719 is an apocalyptic number.

491284719 is a deficient number, since it is larger than the sum of its proper divisors (240508161).

491284719 is a wasteful number, since it uses less digits than its factorization.

491284719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12551 (or 12548 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 491284719 is about 22164.9434693617. The cubic root of 491284719 is about 789.0619207621.

The spelling of 491284719 in words is "four hundred ninety-one million, two hundred eighty-four thousand, seven hundred nineteen".