4431689 has 4 divisors (see below), whose sum is σ = 4436100. Its totient is φ = 4427280.

The previous prime is 4431683. The next prime is 4431697. The reversal of 4431689 is 9861344.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1982464 + 2449225 = 1408^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 4431689 - 2⁴ = 4431673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4431683) 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, 119 + ... + 2979.

It is an arithmetic number, because the mean of its divisors is an integer number (1109025).

Almost surely, 2^4431689 is an apocalyptic number.

It is an amenable number.

4431689 is a deficient number, since it is larger than the sum of its proper divisors (4411).

4431689 is a wasteful number, since it uses less digits than its factorization.

4431689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4410.

The product of its digits is 20736, while the sum is 35.

The square root of 4431689 is about 2105.1577138067. The cubic root of 4431689 is about 164.2566994218.

The spelling of 4431689 in words is "four million, four hundred thirty-one thousand, six hundred eighty-nine".