3906939 has 4 divisors (see below), whose sum is σ = 5209256. Its totient is φ = 2604624.

The previous prime is 3906919. The next prime is 3906949. The reversal of 3906939 is 9396093.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3906939 - 2⁵ = 3906907 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3906897 and 3906906.

It is not an unprimeable number, because it can be changed into a prime (3906919) 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, 651154 + ... + 651159.

It is an arithmetic number, because the mean of its divisors is an integer number (1302314).

Almost surely, 2^3906939 is an apocalyptic number.

3906939 is a deficient number, since it is larger than the sum of its proper divisors (1302317).

3906939 is a wasteful number, since it uses less digits than its factorization.

3906939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302316.

The product of its (nonzero) digits is 39366, while the sum is 39.

The square root of 3906939 is about 1976.5978346644. The cubic root of 3906939 is about 157.4993902723.

The spelling of 3906939 in words is "three million, nine hundred six thousand, nine hundred thirty-nine".