19689119 has 2 divisors, whose sum is σ = 19689120. Its totient is φ = 19689118.

The previous prime is 19689101. The next prime is 19689121. The reversal of 19689119 is 91198691.

It is a strong prime.

It is an emirp because it is prime and its reverse (91198691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19689119 - 2⁸ = 19688863 is a prime.

It is a super-2 number, since 2×19689119² = 775322813992322, which contains 22 as substring.

Together with 19689121, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19689119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19689419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9844559 + 9844560.

It is an arithmetic number, because the mean of its divisors is an integer number (9844560).

Almost surely, 2^19689119 is an apocalyptic number.

19689119 is a deficient number, since it is larger than the sum of its proper divisors (1).

19689119 is an equidigital number, since it uses as much as digits as its factorization.

19689119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 44.

The square root of 19689119 is about 4437.2422742059. The cubic root of 19689119 is about 270.0279760678.

The spelling of 19689119 in words is "nineteen million, six hundred eighty-nine thousand, one hundred nineteen".