3900709 has 4 divisors (see below), whose sum is σ = 3914316. Its totient is φ = 3887104.

The previous prime is 3900707. The next prime is 3900733. The reversal of 3900709 is 9070093.

3900709 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 an emirpimes, since its reverse is a distinct semiprime: 9070093 = 419 ⋅21647.

It can be written as a sum of positive squares in 2 ways, for example, as 2712609 + 1188100 = 1647^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 3900709 - 2¹ = 3900707 is a prime.

It is an Ulam number.

It is a Duffinian number.

3900709 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900707) 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, 6364 + ... + 6949.

It is an arithmetic number, because the mean of its divisors is an integer number (978579).

Almost surely, 2^3900709 is an apocalyptic number.

It is an amenable number.

3900709 is a deficient number, since it is larger than the sum of its proper divisors (13607).

3900709 is a wasteful number, since it uses less digits than its factorization.

3900709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13606.

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 3900709 is about 1975.0212657083. The cubic root of 3900709 is about 157.4156296253.

The spelling of 3900709 in words is "three million, nine hundred thousand, seven hundred nine".