3936689 has 4 divisors (see below), whose sum is σ = 4043124. Its totient is φ = 3830256.

The previous prime is 3936683. The next prime is 3936727. The reversal of 3936689 is 9866393.

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 3783025 + 153664 = 1945^2 + 392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3936689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3936683) 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, 53162 + ... + 53235.

It is an arithmetic number, because the mean of its divisors is an integer number (1010781).

Almost surely, 2^3936689 is an apocalyptic number.

It is an amenable number.

3936689 is a deficient number, since it is larger than the sum of its proper divisors (106435).

3936689 is a wasteful number, since it uses less digits than its factorization.

3936689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106434.

The product of its digits is 209952, while the sum is 44.

The square root of 3936689 is about 1984.1091199831. The cubic root of 3936689 is about 157.8981477840.

The spelling of 3936689 in words is "three million, nine hundred thirty-six thousand, six hundred eighty-nine".