4085689 has 4 divisors (see below), whose sum is σ = 4090240. Its totient is φ = 4081140.

The previous prime is 4085687. The next prime is 4085693. The reversal of 4085689 is 9865804.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4085689 - 2¹ = 4085687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4085687) 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, 429 + ... + 2890.

It is an arithmetic number, because the mean of its divisors is an integer number (1022560).

Almost surely, 2^4085689 is an apocalyptic number.

It is an amenable number.

4085689 is a deficient number, since it is larger than the sum of its proper divisors (4551).

4085689 is a wasteful number, since it uses less digits than its factorization.

4085689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4550.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 4085689 is about 2021.3087344589. The cubic root of 4085689 is about 159.8656293724.

It can be divided in two parts, 4085 and 689, that added together give a palindrome (4774).

The spelling of 4085689 in words is "four million, eighty-five thousand, six hundred eighty-nine".