1919192109 has 32 divisors (see below), whose sum is σ = 2801664000. Its totient is φ = 1164331584.

The previous prime is 1919192087. The next prime is 1919192137. The reversal of 1919192109 is 9012919191.

It is not a de Polignac number, because 1919192109 - 2²⁰ = 1918143533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919192159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160852 + ... + 172370.

It is an arithmetic number, because the mean of its divisors is an integer number (87552000).

Almost surely, 2^1919192109 is an apocalyptic number.

1919192109 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1919192109 is a deficient number, since it is larger than the sum of its proper divisors (882471891).

1919192109 is a wasteful number, since it uses less digits than its factorization.

1919192109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11657.

The product of its (nonzero) digits is 13122, while the sum is 42.

The square root of 1919192109 is about 43808.5848778524. The cubic root of 1919192109 is about 1242.7186511766.

The spelling of 1919192109 in words is "one billion, nine hundred nineteen million, one hundred ninety-two thousand, one hundred nine".