491017 has 8 divisors (see below), whose sum is σ = 529760. Its totient is φ = 453600.

The previous prime is 491003. The next prime is 491039. The reversal of 491017 is 710194.

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-491017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 517 + ... + 1117.

It is an arithmetic number, because the mean of its divisors is an integer number (66220).

2⁴⁹¹⁰¹⁷ is an apocalyptic number.

It is an amenable number.

491017 is a deficient number, since it is larger than the sum of its proper divisors (38743).

491017 is a wasteful number, since it uses less digits than its factorization.

491017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 491017 is about 700.7260520346. The cubic root of 491017 is about 78.8918565159.

The spelling of 491017 in words is "four hundred ninety-one thousand, seventeen".