491319743 has 8 divisors (see below), whose sum is σ = 493399296. Its totient is φ = 489245400.

The previous prime is 491319739. The next prime is 491319749. The reversal of 491319743 is 347913194.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491319743 - 2² = 491319739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491319743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491319749) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379928 + ... + 381218.

It is an arithmetic number, because the mean of its divisors is an integer number (61674912).

Almost surely, 2^491319743 is an apocalyptic number.

491319743 is a deficient number, since it is larger than the sum of its proper divisors (2079553).

491319743 is a wasteful number, since it uses less digits than its factorization.

491319743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2605.

The product of its digits is 81648, while the sum is 41.

The square root of 491319743 is about 22165.7335317377. The cubic root of 491319743 is about 789.0806712252.

The spelling of 491319743 in words is "four hundred ninety-one million, three hundred nineteen thousand, seven hundred forty-three".