3856109 has 2 divisors, whose sum is σ = 3856110. Its totient is φ = 3856108.

The previous prime is 3856067. The next prime is 3856123. The reversal of 3856109 is 9016583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3433609 + 422500 = 1853^2 + 650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3856109 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3856129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1928054 + 1928055.

It is an arithmetic number, because the mean of its divisors is an integer number (1928055).

Almost surely, 2^3856109 is an apocalyptic number.

It is an amenable number.

3856109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3856109 is an equidigital number, since it uses as much as digits as its factorization.

3856109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 3856109 is about 1963.6977873390. The cubic root of 3856109 is about 156.8133744709.

The spelling of 3856109 in words is "three million, eight hundred fifty-six thousand, one hundred nine".