3109213 has 2 divisors, whose sum is σ = 3109214. Its totient is φ = 3109212.

The previous prime is 3109199. The next prime is 3109247. The reversal of 3109213 is 3129013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2913849 + 195364 = 1707^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 3109213 - 2⁹ = 3108701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3109273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1554606 + 1554607.

It is an arithmetic number, because the mean of its divisors is an integer number (1554607).

Almost surely, 2^3109213 is an apocalyptic number.

It is an amenable number.

3109213 is a deficient number, since it is larger than the sum of its proper divisors (1).

3109213 is an equidigital number, since it uses as much as digits as its factorization.

3109213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 3109213 is about 1763.2960613578. The cubic root of 3109213 is about 145.9542766686.

The spelling of 3109213 in words is "three million, one hundred nine thousand, two hundred thirteen".