2229989 has 4 divisors (see below), whose sum is σ = 2238924. Its totient is φ = 2221056.

The previous prime is 2229971. The next prime is 2229991. The reversal of 2229989 is 9899222.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9899222 = 2 ⋅4949611.

It can be written as a sum of positive squares in 2 ways, for example, as 1562500 + 667489 = 1250^2 + 817^2 .

It is a cyclic number.

It is not a de Polignac number, because 2229989 - 2¹⁶ = 2164453 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 (2229959) 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, 4082 + ... + 4595.

It is an arithmetic number, because the mean of its divisors is an integer number (559731).

2^2229989 is an apocalyptic number.

It is an amenable number.

2229989 is a deficient number, since it is larger than the sum of its proper divisors (8935).

2229989 is an equidigital number, since it uses as much as digits as its factorization.

2229989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8934.

The product of its digits is 46656, while the sum is 41.

The square root of 2229989 is about 1493.3147692298. The cubic root of 2229989 is about 130.6474408001.

The spelling of 2229989 in words is "two million, two hundred twenty-nine thousand, nine hundred eighty-nine".