3131427613 has 2 divisors, whose sum is σ = 3131427614. Its totient is φ = 3131427612.

The previous prime is 3131427577. The next prime is 3131427683. The reversal of 3131427613 is 3167241313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1820046244 + 1311381369 = 42662^2 + 36213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3131427613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3131427683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565713806 + 1565713807.

It is an arithmetic number, because the mean of its divisors is an integer number (1565713807).

Almost surely, 2^3131427613 is an apocalyptic number.

It is an amenable number.

3131427613 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131427613 is an equidigital number, since it uses as much as digits as its factorization.

3131427613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 3131427613 is about 55959.1602242207. The cubic root of 3131427613 is about 1463.0105535558.

Adding to 3131427613 its reverse (3167241313), we get a palindrome (6298668926).

The spelling of 3131427613 in words is "three billion, one hundred thirty-one million, four hundred twenty-seven thousand, six hundred thirteen".