2119021789 has 4 divisors (see below), whose sum is σ = 2144552256. Its totient is φ = 2093491324.

The previous prime is 2119021787. The next prime is 2119021799. The reversal of 2119021789 is 9871209112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2119021789 - 2¹ = 2119021787 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2119021787) 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, 12765109 + ... + 12765274.

It is an arithmetic number, because the mean of its divisors is an integer number (536138064).

Almost surely, 2^2119021789 is an apocalyptic number.

It is an amenable number.

2119021789 is a deficient number, since it is larger than the sum of its proper divisors (25530467).

2119021789 is an equidigital number, since it uses as much as digits as its factorization.

2119021789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25530466.

The product of its (nonzero) digits is 18144, while the sum is 40.

The square root of 2119021789 is about 46032.8338145720. The cubic root of 2119021789 is about 1284.4340422804.

The spelling of 2119021789 in words is "two billion, one hundred nineteen million, twenty-one thousand, seven hundred eighty-nine".