2179889 has 8 divisors (see below), whose sum is σ = 2369280. Its totient is φ = 1998000.

The previous prime is 2179867. The next prime is 2179897. The reversal of 2179889 is 9889712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2179889 - 2¹² = 2175793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2179819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1262 + ... + 2439.

It is an arithmetic number, because the mean of its divisors is an integer number (296160).

2^2179889 is an apocalyptic number.

It is an amenable number.

2179889 is a deficient number, since it is larger than the sum of its proper divisors (189391).

2179889 is a wasteful number, since it uses less digits than its factorization.

2179889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751.

The product of its digits is 72576, while the sum is 44.

The square root of 2179889 is about 1476.4447162017. Note that the first 3 decimals coincide. The cubic root of 2179889 is about 129.6616249438.

The spelling of 2179889 in words is "two million, one hundred seventy-nine thousand, eight hundred eighty-nine".