31313414393 has 2 divisors, whose sum is σ = 31313414394. Its totient is φ = 31313414392.

The previous prime is 31313414381. The next prime is 31313414437. The reversal of 31313414393 is 39341431313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29108454544 + 2204959849 = 170612^2 + 46957^2 .

It is a cyclic number.

It is not a de Polignac number, because 31313414393 - 2⁶ = 31313414329 is a prime.

It is not a weakly prime, because it can be changed into another prime (31313414323) 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, 15656707196 + 15656707197.

It is an arithmetic number, because the mean of its divisors is an integer number (15656707197).

Almost surely, 2^31313414393 is an apocalyptic number.

It is an amenable number.

31313414393 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313414393 is an equidigital number, since it uses as much as digits as its factorization.

31313414393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The spelling of 31313414393 in words is "thirty-one billion, three hundred thirteen million, four hundred fourteen thousand, three hundred ninety-three".