491363749 has 8 divisors (see below), whose sum is σ = 500472000. Its totient is φ = 482335392.

The previous prime is 491363683. The next prime is 491363773. The reversal of 491363749 is 947363194.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491363749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491363699 and 491363708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495363749) 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, 7489 + ... + 32230.

It is an arithmetic number, because the mean of its divisors is an integer number (62559000).

Almost surely, 2^491363749 is an apocalyptic number.

It is an amenable number.

491363749 is a deficient number, since it is larger than the sum of its proper divisors (9108251).

491363749 is a wasteful number, since it uses less digits than its factorization.

491363749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39947.

The product of its digits is 489888, while the sum is 46.

The square root of 491363749 is about 22166.7261678399. The cubic root of 491363749 is about 789.1042290324.

The spelling of 491363749 in words is "four hundred ninety-one million, three hundred sixty-three thousand, seven hundred forty-nine".