491719 has 2 divisors, whose sum is σ = 491720. Its totient is φ = 491718.

The previous prime is 491707. The next prime is 491731. The reversal of 491719 is 917194.

It is a balanced prime because it is at equal distance from previous prime (491707) and next prime (491731).

It is a cyclic number.

It is not a de Polignac number, because 491719 - 2⁷ = 491591 is a prime.

It is a super-2 number, since 2×491719² = 483575149922, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245859 + 245860.

It is an arithmetic number, because the mean of its divisors is an integer number (245860).

2⁴⁹¹⁷¹⁹ is an apocalyptic number.

491719 is a deficient number, since it is larger than the sum of its proper divisors (1).

491719 is an equidigital number, since it uses as much as digits as its factorization.

491719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268, while the sum is 31.

The square root of 491719 is about 701.2267821468. The cubic root of 491719 is about 78.9294354668.

The spelling of 491719 in words is "four hundred ninety-one thousand, seven hundred nineteen".