2169021889 has 4 divisors (see below), whose sum is σ = 2185579440. Its totient is φ = 2152464340.

The previous prime is 2169021871. The next prime is 2169021901. The reversal of 2169021889 is 9881209612.

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 2169021889 - 2¹⁷ = 2168890817 is a prime.

It is a super-2 number, since 2×2169021889² = 9409311909922256642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2169021809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8278579 + ... + 8278840.

It is an arithmetic number, because the mean of its divisors is an integer number (546394860).

Almost surely, 2^2169021889 is an apocalyptic number.

It is an amenable number.

2169021889 is a deficient number, since it is larger than the sum of its proper divisors (16557551).

2169021889 is a wasteful number, since it uses less digits than its factorization.

2169021889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16557550.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 2169021889 is about 46572.7590872604. The cubic root of 2169021889 is about 1294.4580428768.

It can be divided in two parts, 216902 and 1889, that added together give a triangular number (218791 = T₆₆₁).

The spelling of 2169021889 in words is "two billion, one hundred sixty-nine million, twenty-one thousand, eight hundred eighty-nine".