3121683343837 has 2 divisors, whose sum is σ = 3121683343838. Its totient is φ = 3121683343836.

The previous prime is 3121683343741. The next prime is 3121683343879. The reversal of 3121683343837 is 7383433861213.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3008094796996 + 113588546841 = 1734386^2 + 337029^2 .

It is a cyclic number.

It is not a de Polignac number, because 3121683343837 - 2¹⁵ = 3121683311069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121683340837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560841671918 + 1560841671919.

It is an arithmetic number, because the mean of its divisors is an integer number (1560841671919).

Almost surely, 2^{3121683343837} is an apocalyptic number.

It is an amenable number.

3121683343837 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121683343837 is an equidigital number, since it uses as much as digits as its factorization.

3121683343837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 52.

The spelling of 3121683343837 in words is "three trillion, one hundred twenty-one billion, six hundred eighty-three million, three hundred forty-three thousand, eight hundred thirty-seven".