2189387 has 4 divisors (see below), whose sum is σ = 2212056. Its totient is φ = 2166720.

The previous prime is 2189381. The next prime is 2189399. The reversal of 2189387 is 7839812.

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 2189387 - 2⁴ = 2189371 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2189387.

It is not an unprimeable number, because it can be changed into a prime (2189381) 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, 11189 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (553014).

2^2189387 is an apocalyptic number.

2189387 is a deficient number, since it is larger than the sum of its proper divisors (22669).

2189387 is an equidigital number, since it uses as much as digits as its factorization.

2189387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22668.

The product of its digits is 24192, while the sum is 38.

The square root of 2189387 is about 1479.6577306931. The cubic root of 2189387 is about 129.8496684332.

The spelling of 2189387 in words is "two million, one hundred eighty-nine thousand, three hundred eighty-seven".