3123689 has 2 divisors, whose sum is σ = 3123690. Its totient is φ = 3123688.

The previous prime is 3123683. The next prime is 3123709. The reversal of 3123689 is 9863213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3115225 + 8464 = 1765^2 + 92^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3123689 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3123683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561844 + 1561845.

It is an arithmetic number, because the mean of its divisors is an integer number (1561845).

Almost surely, 2^3123689 is an apocalyptic number.

It is an amenable number.

3123689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123689 is an equidigital number, since it uses as much as digits as its factorization.

3123689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 3123689 is about 1767.3961072719. The cubic root of 3123689 is about 146.1804393190.

The spelling of 3123689 in words is "three million, one hundred twenty-three thousand, six hundred eighty-nine".