3131173 has 2 divisors, whose sum is σ = 3131174. Its totient is φ = 3131172.

The previous prime is 3131153. The next prime is 3131203. The reversal of 3131173 is 3711313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2455489 + 675684 = 1567^2 + 822^2 .

It is an emirp because it is prime and its reverse (3711313) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3131173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565586 + 1565587.

It is an arithmetic number, because the mean of its divisors is an integer number (1565587).

Almost surely, 2^3131173 is an apocalyptic number.

It is an amenable number.

3131173 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131173 is an equidigital number, since it uses as much as digits as its factorization.

3131173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189, while the sum is 19.

The square root of 3131173 is about 1769.5120796423. The cubic root of 3131173 is about 146.2970900545.

Adding to 3131173 its reverse (3711313), we get a palindrome (6842486).

The spelling of 3131173 in words is "three million, one hundred thirty-one thousand, one hundred seventy-three".