1919200099 has 4 divisors (see below), whose sum is σ = 1919290464. Its totient is φ = 1919109736.

The previous prime is 1919200079. The next prime is 1919200139. The reversal of 1919200099 is 9900029191.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1919200099 - 2⁹ = 1919199587 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1919200039) 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, 6009 + ... + 62245.

It is an arithmetic number, because the mean of its divisors is an integer number (479822616).

Almost surely, 2^1919200099 is an apocalyptic number.

1919200099 is a deficient number, since it is larger than the sum of its proper divisors (90365).

1919200099 is an equidigital number, since it uses as much as digits as its factorization.

1919200099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90364.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 1919200099 is about 43808.6760699293. The cubic root of 1919200099 is about 1242.7203757405.

The spelling of 1919200099 in words is "one billion, nine hundred nineteen million, two hundred thousand, ninety-nine".