2179189 has 4 divisors (see below), whose sum is σ = 2238124. Its totient is φ = 2120256.

The previous prime is 2179187. The next prime is 2179211. The reversal of 2179189 is 9819712.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1144900 + 1034289 = 1070^2 + 1017^2 .

It is a cyclic number.

It is not a de Polignac number, because 2179189 - 2¹ = 2179187 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 58897 = 2179189 / (2 + 1 + 7 + 9 + 1 + 8 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179187) 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, 29412 + ... + 29485.

It is an arithmetic number, because the mean of its divisors is an integer number (559531).

2^2179189 is an apocalyptic number.

It is an amenable number.

2179189 is a deficient number, since it is larger than the sum of its proper divisors (58935).

2179189 is an equidigital number, since it uses as much as digits as its factorization.

2179189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58934.

The product of its digits is 9072, while the sum is 37.

The square root of 2179189 is about 1476.2076412212. The cubic root of 2179189 is about 129.6477445957.

The spelling of 2179189 in words is "two million, one hundred seventy-nine thousand, one hundred eighty-nine".