2189407 has 4 divisors (see below), whose sum is σ = 2388456. Its totient is φ = 1990360.

The previous prime is 2189399. The next prime is 2189417. The reversal of 2189407 is 7049812.

2189407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2189407 - 2³ = 2189399 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99508 + ... + 99529.

It is an arithmetic number, because the mean of its divisors is an integer number (597114).

2^2189407 is an apocalyptic number.

2189407 is a deficient number, since it is larger than the sum of its proper divisors (199049).

2189407 is a wasteful number, since it uses less digits than its factorization.

2189407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199048.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 2189407 is about 1479.6644889974. The cubic root of 2189407 is about 129.8500638232.

The spelling of 2189407 in words is "two million, one hundred eighty-nine thousand, four hundred seven".