491339 has 2 divisors, whose sum is σ = 491340. Its totient is φ = 491338.

The previous prime is 491333. The next prime is 491341. The reversal of 491339 is 933194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491339 - 2⁸ = 491083 is a prime.

Together with 491341, 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 (491333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245669 + 245670.

It is an arithmetic number, because the mean of its divisors is an integer number (245670).

2⁴⁹¹³³⁹ is an apocalyptic number.

491339 is a deficient number, since it is larger than the sum of its proper divisors (1).

491339 is an equidigital number, since it uses as much as digits as its factorization.

491339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 491339 is about 700.9557760658. The cubic root of 491339 is about 78.9090980281.

The spelling of 491339 in words is "four hundred ninety-one thousand, three hundred thirty-nine".