2259989 has 4 divisors (see below), whose sum is σ = 2297100. Its totient is φ = 2222880.

The previous prime is 2259967. The next prime is 2260009. The reversal of 2259989 is 9899522.

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 180625 + 2079364 = 425^2 + 1442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2259989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2259919) 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, 18464 + ... + 18585.

It is an arithmetic number, because the mean of its divisors is an integer number (574275).

2^2259989 is an apocalyptic number.

It is an amenable number.

2259989 is a deficient number, since it is larger than the sum of its proper divisors (37111).

2259989 is an equidigital number, since it uses as much as digits as its factorization.

2259989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37110.

The product of its digits is 116640, while the sum is 44.

The square root of 2259989 is about 1503.3259792873. The cubic root of 2259989 is about 131.2306989003.

The spelling of 2259989 in words is "two million, two hundred fifty-nine thousand, nine hundred eighty-nine".