3935689 has 4 divisors (see below), whose sum is σ = 3959424. Its totient is φ = 3911956.

The previous prime is 3935683. The next prime is 3935699. The reversal of 3935689 is 9865393.

3935689 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9865393 = 263 ⋅37511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3935689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3935683) 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, 11617 + ... + 11950.

It is an arithmetic number, because the mean of its divisors is an integer number (989856).

Almost surely, 2^3935689 is an apocalyptic number.

It is an amenable number.

3935689 is a deficient number, since it is larger than the sum of its proper divisors (23735).

3935689 is a wasteful number, since it uses less digits than its factorization.

3935689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23734.

The product of its digits is 174960, while the sum is 43.

The square root of 3935689 is about 1983.8571017087. The cubic root of 3935689 is about 157.8847768591.

It can be divided in two parts, 3935 and 689, that added together give a square (4624 = 68²).

The spelling of 3935689 in words is "three million, nine hundred thirty-five thousand, six hundred eighty-nine".