2195789 has 4 divisors (see below), whose sum is σ = 2218524. Its totient is φ = 2173056.

The previous prime is 2195777. The next prime is 2195801. The reversal of 2195789 is 9875912.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2195777) and next prime (2195801).

It can be written as a sum of positive squares in 2 ways, for example, as 779689 + 1416100 = 883^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 2195789 - 2²⁰ = 1147213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2195729) 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, 11222 + ... + 11415.

It is an arithmetic number, because the mean of its divisors is an integer number (554631).

2^2195789 is an apocalyptic number.

It is an amenable number.

2195789 is a deficient number, since it is larger than the sum of its proper divisors (22735).

2195789 is an equidigital number, since it uses as much as digits as its factorization.

2195789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22734.

The product of its digits is 45360, while the sum is 41.

The square root of 2195789 is about 1481.8194896815. The cubic root of 2195789 is about 129.9761100084.

The spelling of 2195789 in words is "two million, one hundred ninety-five thousand, seven hundred eighty-nine".