3131123 has 2 divisors, whose sum is σ = 3131124. Its totient is φ = 3131122.

The previous prime is 3131113. The next prime is 3131137. The reversal of 3131123 is 3211313.

It is an a-pointer prime, because the next prime (3131137) can be obtained adding 3131123 to its sum of digits (14).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131123 is a prime.

It is a super-2 number, since 2×3131123² = 19607862482258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 3131098 and 3131107.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565561 + 1565562.

It is an arithmetic number, because the mean of its divisors is an integer number (1565562).

Almost surely, 2^3131123 is an apocalyptic number.

3131123 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131123 is an equidigital number, since it uses as much as digits as its factorization.

3131123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54, while the sum is 14.

The square root of 3131123 is about 1769.4979513975. The cubic root of 3131123 is about 146.2963113374.

Adding to 3131123 its reverse (3211313), we get a palindrome (6342436).

The spelling of 3131123 in words is "three million, one hundred thirty-one thousand, one hundred twenty-three".