491837 has 2 divisors, whose sum is σ = 491838. Its totient is φ = 491836.

The previous prime is 491833. The next prime is 491851. The reversal of 491837 is 738194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481636 + 10201 = 694^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 491837 - 2² = 491833 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491837.

It is not a weakly prime, because it can be changed into another prime (491833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245918 + 245919.

It is an arithmetic number, because the mean of its divisors is an integer number (245919).

2⁴⁹¹⁸³⁷ is an apocalyptic number.

It is an amenable number.

491837 is a deficient number, since it is larger than the sum of its proper divisors (1).

491837 is an equidigital number, since it uses as much as digits as its factorization.

491837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 491837 is about 701.3109153578. The cubic root of 491837 is about 78.9357486446.

The spelling of 491837 in words is "four hundred ninety-one thousand, eight hundred thirty-seven".