2144389 has 4 divisors (see below), whose sum is σ = 2309356. Its totient is φ = 1979424.

The previous prime is 2144383. The next prime is 2144399. The reversal of 2144389 is 9834412.

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 624100 + 1520289 = 790^2 + 1233^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144389 - 2⁹ = 2143877 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 4⁶ + 4⁷ + 3⁹ + 8³ + 9⁴ .

It is a Duffinian number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 2144389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144383) 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, 82464 + ... + 82489.

It is an arithmetic number, because the mean of its divisors is an integer number (577339).

2^2144389 is an apocalyptic number.

It is an amenable number.

2144389 is a deficient number, since it is larger than the sum of its proper divisors (164967).

2144389 is a wasteful number, since it uses less digits than its factorization.

2144389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164966.

The product of its digits is 6912, while the sum is 31.

The square root of 2144389 is about 1464.3732447706. The cubic root of 2144389 is about 128.9539125872.

The spelling of 2144389 in words is "two million, one hundred forty-four thousand, three hundred eighty-nine".