2188671 has 4 divisors (see below), whose sum is σ = 2918232. Its totient is φ = 1459112.

The previous prime is 2188663. The next prime is 2188673. The reversal of 2188671 is 1768812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2188671 - 2³ = 2188663 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364776 + ... + 364781.

It is an arithmetic number, because the mean of its divisors is an integer number (729558).

2^2188671 is an apocalyptic number.

2188671 is a deficient number, since it is larger than the sum of its proper divisors (729561).

2188671 is an equidigital number, since it uses as much as digits as its factorization.

2188671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729560.

The product of its digits is 5376, while the sum is 33.

The square root of 2188671 is about 1479.4157630632. The cubic root of 2188671 is about 129.8355118832.

The spelling of 2188671 in words is "two million, one hundred eighty-eight thousand, six hundred seventy-one".