491188219 has 2 divisors, whose sum is σ = 491188220. Its totient is φ = 491188218.

The previous prime is 491188213. The next prime is 491188223. The reversal of 491188219 is 912881194.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 491188219 - 2⁷ = 491188091 is a prime.

It is a super-2 number, since 2×491188219² = 482531732968783922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (491188213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245594109 + 245594110.

It is an arithmetic number, because the mean of its divisors is an integer number (245594110).

Almost surely, 2^491188219 is an apocalyptic number.

491188219 is a deficient number, since it is larger than the sum of its proper divisors (1).

491188219 is an equidigital number, since it uses as much as digits as its factorization.

491188219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 43.

The square root of 491188219 is about 22162.7665014998. The cubic root of 491188219 is about 789.0102538716.

The spelling of 491188219 in words is "four hundred ninety-one million, one hundred eighty-eight thousand, two hundred nineteen".