313128919237 has 2 divisors, whose sum is σ = 313128919238. Its totient is φ = 313128919236.

The previous prime is 313128919217. The next prime is 313128919241. The reversal of 313128919237 is 732919821313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157931528836 + 155197390401 = 397406^2 + 393951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-313128919237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313128919217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156564459618 + 156564459619.

It is an arithmetic number, because the mean of its divisors is an integer number (156564459619).

Almost surely, 2^313128919237 is an apocalyptic number.

It is an amenable number.

313128919237 is a deficient number, since it is larger than the sum of its proper divisors (1).

313128919237 is an equidigital number, since it uses as much as digits as its factorization.

313128919237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The spelling of 313128919237 in words is "three hundred thirteen billion, one hundred twenty-eight million, nine hundred nineteen thousand, two hundred thirty-seven".