2443689 has 10 divisors (see below), whose sum is σ = 3650570. Its totient is φ = 1629072.

The previous prime is 2443687. The next prime is 2443703. The reversal of 2443689 is 9863442.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2152089 + 291600 = 1467^2 + 540^2 .

It is not a de Polignac number, because 2443689 - 2¹ = 2443687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2443687) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 15004 + ... + 15165.

It is an arithmetic number, because the mean of its divisors is an integer number (365057).

2^2443689 is an apocalyptic number.

It is an amenable number.

2443689 is a deficient number, since it is larger than the sum of its proper divisors (1206881).

2443689 is an equidigital number, since it uses as much as digits as its factorization.

2443689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30181 (or 30172 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 2443689 is about 1563.2303093275. The cubic root of 2443689 is about 134.6941222925.

The spelling of 2443689 in words is "two million, four hundred forty-three thousand, six hundred eighty-nine".