1912019091 has 16 divisors (see below), whose sum is σ = 2569003008. Its totient is φ = 1264896000.

The previous prime is 1912019041. The next prime is 1912019101. The reversal of 1912019091 is 1909102191.

It is not a de Polignac number, because 1912019091 - 2⁶ = 1912019027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1912019041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204366 + ... + 213516.

It is an arithmetic number, because the mean of its divisors is an integer number (160562688).

Almost surely, 2^1912019091 is an apocalyptic number.

1912019091 is a deficient number, since it is larger than the sum of its proper divisors (656983917).

1912019091 is a wasteful number, since it uses less digits than its factorization.

1912019091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9682.

The product of its (nonzero) digits is 1458, while the sum is 33.

The square root of 1912019091 is about 43726.6405181098. The cubic root of 1912019091 is about 1241.1684899049.

The spelling of 1912019091 in words is "one billion, nine hundred twelve million, nineteen thousand, ninety-one".