491219 has 2 divisors, whose sum is σ = 491220. Its totient is φ = 491218.

The previous prime is 491213. The next prime is 491251. The reversal of 491219 is 912194.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491219 is a prime.

It is a super-2 number, since 2×491219² = 482592211922, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is equal to p₄₀₈₅₉ and since 491219 and 40859 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (491213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245609 + 245610.

It is an arithmetic number, because the mean of its divisors is an integer number (245610).

2⁴⁹¹²¹⁹ is an apocalyptic number.

491219 is a deficient number, since it is larger than the sum of its proper divisors (1).

491219 is an equidigital number, since it uses as much as digits as its factorization.

491219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 26.

The square root of 491219 is about 700.8701734273. The cubic root of 491219 is about 78.9026735006.

The spelling of 491219 in words is "four hundred ninety-one thousand, two hundred nineteen".