3906709 has 2 divisors, whose sum is σ = 3906710. Its totient is φ = 3906708.

The previous prime is 3906701. The next prime is 3906731. The reversal of 3906709 is 9076093.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 6084 = 1975^2 + 78^2 .

It is a cyclic number.

It is not a de Polignac number, because 3906709 - 2³ = 3906701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3906701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1953354 + 1953355.

It is an arithmetic number, because the mean of its divisors is an integer number (1953355).

Almost surely, 2^3906709 is an apocalyptic number.

It is an amenable number.

3906709 is a deficient number, since it is larger than the sum of its proper divisors (1).

3906709 is an equidigital number, since it uses as much as digits as its factorization.

3906709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 3906709 is about 1976.5396530300. The cubic root of 3906709 is about 157.4962995687.

The spelling of 3906709 in words is "three million, nine hundred six thousand, seven hundred nine".