3105689 has 2 divisors, whose sum is σ = 3105690. Its totient is φ = 3105688.

The previous prime is 3105659. The next prime is 3105691. The reversal of 3105689 is 9865013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3003289 + 102400 = 1733^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 3105689 - 2⁸ = 3105433 is a prime.

Together with 3105691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3105629) 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, 1552844 + 1552845.

It is an arithmetic number, because the mean of its divisors is an integer number (1552845).

Almost surely, 2^3105689 is an apocalyptic number.

It is an amenable number.

3105689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3105689 is an equidigital number, since it uses as much as digits as its factorization.

3105689 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 3105689 is about 1762.2965130760. The cubic root of 3105689 is about 145.8991140156.

The spelling of 3105689 in words is "three million, one hundred five thousand, six hundred eighty-nine".