491849497 has 8 divisors (see below), whose sum is σ = 503015040. Its totient is φ = 480807600.

The previous prime is 491849471. The next prime is 491849507. The reversal of 491849497 is 794948194.

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-491849497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491849467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22843 + ... + 38800.

It is an arithmetic number, because the mean of its divisors is an integer number (62876880).

Almost surely, 2^491849497 is an apocalyptic number.

It is an amenable number.

491849497 is a deficient number, since it is larger than the sum of its proper divisors (11165543).

491849497 is a wasteful number, since it uses less digits than its factorization.

491849497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61823.

The product of its digits is 2612736, while the sum is 55.

The square root of 491849497 is about 22177.6801537041. The cubic root of 491849497 is about 789.3641719381.

The spelling of 491849497 in words is "four hundred ninety-one million, eight hundred forty-nine thousand, four hundred ninety-seven".