3939709 has 8 divisors (see below), whose sum is σ = 4015800. Its totient is φ = 3864576.

The previous prime is 3939673. The next prime is 3939713. The reversal of 3939709 is 9079393.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 27225 + 3912484 = 165^2 + 1978^2 .

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 3939709 - 2¹³ = 3931517 is a prime.

It is a super-3 number, since 3×3939709³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939769) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20317 + ... + 20509.

It is an arithmetic number, because the mean of its divisors is an integer number (501975).

Almost surely, 2^3939709 is an apocalyptic number.

It is an amenable number.

3939709 is a deficient number, since it is larger than the sum of its proper divisors (76091).

3939709 is a wasteful number, since it uses less digits than its factorization.

3939709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 3939709 is about 1984.8700209334. The cubic root of 3939709 is about 157.9385142375.

The spelling of 3939709 in words is "three million, nine hundred thirty-nine thousand, seven hundred nine".