3915685 has 4 divisors (see below), whose sum is σ = 4698828. Its totient is φ = 3132544.

The previous prime is 3915683. The next prime is 3915689. The reversal of 3915685 is 5865193.

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 2982529 + 933156 = 1727^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 3915685 - 2¹ = 3915683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3915683) 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, 391564 + ... + 391573.

It is an arithmetic number, because the mean of its divisors is an integer number (1174707).

Almost surely, 2^3915685 is an apocalyptic number.

It is an amenable number.

3915685 is a deficient number, since it is larger than the sum of its proper divisors (783143).

3915685 is an equidigital number, since it uses as much as digits as its factorization.

3915685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783142.

The product of its digits is 32400, while the sum is 37.

The square root of 3915685 is about 1978.8089852232. The cubic root of 3915685 is about 157.6168277401.

The spelling of 3915685 in words is "three million, nine hundred fifteen thousand, six hundred eighty-five".