2127889 has 4 divisors (see below), whose sum is σ = 2149924. Its totient is φ = 2105856.

The previous prime is 2127887. The next prime is 2127893. The reversal of 2127889 is 9887212.

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 627264 + 1500625 = 792^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 2127889 - 2¹ = 2127887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2127883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10872 + ... + 11065.

It is an arithmetic number, because the mean of its divisors is an integer number (537481).

2^2127889 is an apocalyptic number.

It is an amenable number.

2127889 is a deficient number, since it is larger than the sum of its proper divisors (22035).

2127889 is an equidigital number, since it uses as much as digits as its factorization.

2127889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22034.

The product of its digits is 16128, while the sum is 37.

The square root of 2127889 is about 1458.7285559692. The cubic root of 2127889 is about 128.6223153656.

The spelling of 2127889 in words is "two million, one hundred twenty-seven thousand, eight hundred eighty-nine".