491297 has 2 divisors, whose sum is σ = 491298. Its totient is φ = 491296.

The previous prime is 491279. The next prime is 491299. The reversal of 491297 is 792194.

Together with previous prime (491279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358801 + 132496 = 599^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 491297 - 2⁸ = 491041 is a prime.

Together with 491299, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (491299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245648 + 245649.

It is an arithmetic number, because the mean of its divisors is an integer number (245649).

2⁴⁹¹²⁹⁷ is an apocalyptic number.

It is an amenable number.

491297 is a deficient number, since it is larger than the sum of its proper divisors (1).

491297 is an equidigital number, since it uses as much as digits as its factorization.

491297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 491297 is about 700.9258163315. The cubic root of 491297 is about 78.9068495625.

The spelling of 491297 in words is "four hundred ninety-one thousand, two hundred ninety-seven".