2237989 has 4 divisors (see below), whose sum is σ = 2410156. Its totient is φ = 2065824.

The previous prime is 2237957. The next prime is 2238011. The reversal of 2237989 is 9897322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9897322 = 2 ⋅4948661.

It can be written as a sum of positive squares in 2 ways, for example, as 756900 + 1481089 = 870^2 + 1217^2 .

It is a cyclic number.

It is not a de Polignac number, because 2237989 - 2⁵ = 2237957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2237909) 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, 86064 + ... + 86089.

It is an arithmetic number, because the mean of its divisors is an integer number (602539).

2^2237989 is an apocalyptic number.

It is an amenable number.

2237989 is a deficient number, since it is larger than the sum of its proper divisors (172167).

2237989 is a wasteful number, since it uses less digits than its factorization.

2237989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172166.

The product of its digits is 54432, while the sum is 40.

The square root of 2237989 is about 1495.9909759086. The cubic root of 2237989 is about 130.8034852416.

The spelling of 2237989 in words is "two million, two hundred thirty-seven thousand, nine hundred eighty-nine".