19119899 has 4 divisors (see below), whose sum is σ = 19586280. Its totient is φ = 18653520.

The previous prime is 19119887. The next prime is 19119911. The reversal of 19119899 is 99891191.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (19119887) and next prime (19119911).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19119899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19119809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233129 + ... + 233210.

It is an arithmetic number, because the mean of its divisors is an integer number (4896570).

Almost surely, 2^19119899 is an apocalyptic number.

19119899 is a deficient number, since it is larger than the sum of its proper divisors (466381).

19119899 is an equidigital number, since it uses as much as digits as its factorization.

19119899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466380.

The product of its digits is 52488, while the sum is 47.

The square root of 19119899 is about 4372.6306727187. The cubic root of 19119899 is about 267.4002842591.

The spelling of 19119899 in words is "nineteen million, one hundred nineteen thousand, eight hundred ninety-nine".