313123133 has 2 divisors, whose sum is σ = 313123134. Its totient is φ = 313123132.

The previous prime is 313123123. The next prime is 313123141. The reversal of 313123133 is 331321313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 234304249 + 78818884 = 15307^2 + 8878^2 .

It is a cyclic number.

It is not a de Polignac number, because 313123133 - 2⁸ = 313122877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313123103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156561566 + 156561567.

It is an arithmetic number, because the mean of its divisors is an integer number (156561567).

Almost surely, 2^313123133 is an apocalyptic number.

It is an amenable number.

313123133 is a deficient number, since it is larger than the sum of its proper divisors (1).

313123133 is an equidigital number, since it uses as much as digits as its factorization.

313123133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 20.

The square root of 313123133 is about 17695.2856151010. The cubic root of 313123133 is about 679.0551561957.

Adding to 313123133 its reverse (331321313), we get a palindrome (644444446).

The spelling of 313123133 in words is "three hundred thirteen million, one hundred twenty-three thousand, one hundred thirty-three".