3131420393 has 2 divisors, whose sum is σ = 3131420394. Its totient is φ = 3131420392.

The previous prime is 3131420363. The next prime is 3131420429. The reversal of 3131420393 is 3930241313.

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., 2630869264 + 500551129 = 51292^2 + 22373^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131420393 - 2¹⁸ = 3131158249 is a prime.

It is not a weakly prime, because it can be changed into another prime (3131420323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1565710196 + 1565710197.

It is an arithmetic number, because the mean of its divisors is an integer number (1565710197).

Almost surely, 2^3131420393 is an apocalyptic number.

It is an amenable number.

3131420393 is a deficient number, since it is larger than the sum of its proper divisors (1).

3131420393 is an equidigital number, since it uses as much as digits as its factorization.

3131420393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 3131420393 is about 55959.0957128508. The cubic root of 3131420393 is about 1463.0094291545.

The spelling of 3131420393 in words is "three billion, one hundred thirty-one million, four hundred twenty thousand, three hundred ninety-three".