4009685 has 8 divisors (see below), whose sum is σ = 4977720. Its totient is φ = 3097024.

The previous prime is 4009679. The next prime is 4009721. The reversal of 4009685 is 5869004.

It can be written as a sum of positive squares in 4 ways, for example, as 1681 + 4008004 = 41^2 + 2002^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4009685 - 2⁴ = 4009669 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13682 + ... + 13971.

It is an arithmetic number, because the mean of its divisors is an integer number (622215).

Almost surely, 2^4009685 is an apocalyptic number.

It is an amenable number.

4009685 is a deficient number, since it is larger than the sum of its proper divisors (968035).

4009685 is a wasteful number, since it uses less digits than its factorization.

4009685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27687.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 4009685 is about 2002.4197861587. The cubic root of 4009685 is about 158.8681184282.

The spelling of 4009685 in words is "four million, nine thousand, six hundred eighty-five".