3123709 has 2 divisors, whose sum is σ = 3123710. Its totient is φ = 3123708.

The previous prime is 3123689. The next prime is 3123713. The reversal of 3123709 is 9073213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2815684 + 308025 = 1678^2 + 555^2 .

It is an emirp because it is prime and its reverse (9073213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3123709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561854 + 1561855.

It is an arithmetic number, because the mean of its divisors is an integer number (1561855).

Almost surely, 2^3123709 is an apocalyptic number.

It is an amenable number.

3123709 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123709 is an equidigital number, since it uses as much as digits as its factorization.

3123709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 25.

The square root of 3123709 is about 1767.4017653041. The cubic root of 3123709 is about 146.1807513008.

The spelling of 3123709 in words is "three million, one hundred twenty-three thousand, seven hundred nine".