2189747 has 8 divisors (see below), whose sum is σ = 2583552. Its totient is φ = 1816200.

The previous prime is 2189743. The next prime is 2189767. The reversal of 2189747 is 7479812.

2189747 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2189747 - 2² = 2189743 is a prime.

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 2189747.

It is not an unprimeable number, because it can be changed into a prime (2189741) 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 7 ways as a sum of consecutive naturals, for example, 4829 + ... + 5262.

It is an arithmetic number, because the mean of its divisors is an integer number (322944).

2^2189747 is an apocalyptic number.

2189747 is a deficient number, since it is larger than the sum of its proper divisors (393805).

2189747 is a wasteful number, since it uses less digits than its factorization.

2189747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10129.

The product of its digits is 28224, while the sum is 38.

The square root of 2189747 is about 1479.7793754476. The cubic root of 2189747 is about 129.8567850856.

The spelling of 2189747 in words is "two million, one hundred eighty-nine thousand, seven hundred forty-seven".