2191044719 has 2 divisors, whose sum is σ = 2191044720. Its totient is φ = 2191044718.

The previous prime is 2191044673. The next prime is 2191044727. The reversal of 2191044719 is 9174401912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2191044719 - 2⁸ = 2191044463 is a prime.

It is a super-2 number, since 2×2191044719² = 9601353921315577922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2191044769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095522359 + 1095522360.

It is an arithmetic number, because the mean of its divisors is an integer number (1095522360).

Almost surely, 2^2191044719 is an apocalyptic number.

2191044719 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191044719 is an equidigital number, since it uses as much as digits as its factorization.

2191044719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 2191044719 is about 46808.5966356608. The cubic root of 2191044719 is about 1298.8243254445.

The spelling of 2191044719 in words is "two billion, one hundred ninety-one million, forty-four thousand, seven hundred nineteen".