3101309 has 2 divisors, whose sum is σ = 3101310. Its totient is φ = 3101308.

The previous prime is 3101299. The next prime is 3101311. The reversal of 3101309 is 9031013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3062500 + 38809 = 1750^2 + 197^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3101309 is a prime.

It is a Sophie Germain prime.

Together with 3101311, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3101339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1550654 + 1550655.

It is an arithmetic number, because the mean of its divisors is an integer number (1550655).

Almost surely, 2^3101309 is an apocalyptic number.

It is an amenable number.

3101309 is a deficient number, since it is larger than the sum of its proper divisors (1).

3101309 is an equidigital number, since it uses as much as digits as its factorization.

3101309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 3101309 is about 1761.0533779531. The cubic root of 3101309 is about 145.8304938404.

The spelling of 3101309 in words is "three million, one hundred one thousand, three hundred nine".