2169689 has 4 divisors (see below), whose sum is σ = 2200320. Its totient is φ = 2139060.

The previous prime is 2169683. The next prime is 2169691. The reversal of 2169689 is 9869612.

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 2169689 - 2¹² = 2165593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2169683) 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, 15209 + ... + 15350.

It is an arithmetic number, because the mean of its divisors is an integer number (550080).

2^2169689 is an apocalyptic number.

It is an amenable number.

2169689 is a deficient number, since it is larger than the sum of its proper divisors (30631).

2169689 is an equidigital number, since it uses as much as digits as its factorization.

2169689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30630.

The product of its digits is 46656, while the sum is 41.

The square root of 2169689 is about 1472.9864222049. The cubic root of 2169689 is about 129.4590738431.

The spelling of 2169689 in words is "two million, one hundred sixty-nine thousand, six hundred eighty-nine".