4031689 has 4 divisors (see below), whose sum is σ = 4048660. Its totient is φ = 4014720.

The previous prime is 4031681. The next prime is 4031711. The reversal of 4031689 is 9861304.

4031689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2839225 + 1192464 = 1685^2 + 1092^2 .

It is a cyclic number.

It is not a de Polignac number, because 4031689 - 2³ = 4031681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4031689.

It is not an unprimeable number, because it can be changed into a prime (4031681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8124 + ... + 8605.

It is an arithmetic number, because the mean of its divisors is an integer number (1012165).

Almost surely, 2^4031689 is an apocalyptic number.

It is an amenable number.

4031689 is a deficient number, since it is larger than the sum of its proper divisors (16971).

4031689 is a wasteful number, since it uses less digits than its factorization.

4031689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16970.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 4031689 is about 2007.9066213348. The cubic root of 4031689 is about 159.1581959924.

The spelling of 4031689 in words is "four million, thirty-one thousand, six hundred eighty-nine".