2219689 has 4 divisors (see below), whose sum is σ = 2296260. Its totient is φ = 2143120.

The previous prime is 2219683. The next prime is 2219731. The reversal of 2219689 is 9869122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9869122 = 2 ⋅4934561.

It can be written as a sum of positive squares in 2 ways, for example, as 779689 + 1440000 = 883^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2219689 - 2³ = 2219681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2219681) 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, 38242 + ... + 38299.

It is an arithmetic number, because the mean of its divisors is an integer number (574065).

2^2219689 is an apocalyptic number.

2219689 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2219689 is a deficient number, since it is larger than the sum of its proper divisors (76571).

2219689 is an equidigital number, since it uses as much as digits as its factorization.

2219689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76570.

The product of its digits is 15552, while the sum is 37.

The square root of 2219689 is about 1489.8620741532. The cubic root of 2219689 is about 130.4459830366.

The spelling of 2219689 in words is "two million, two hundred nineteen thousand, six hundred eighty-nine".