1313320133 has 2 divisors, whose sum is σ = 1313320134. Its totient is φ = 1313320132.

The previous prime is 1313320123. The next prime is 1313320153. The reversal of 1313320133 is 3310233131.

It is an a-pointer prime, because the next prime (1313320153) can be obtained adding 1313320133 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1312105729 + 1214404 = 36223^2 + 1102^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313320133 - 2⁸ = 1313319877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313320123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656660066 + 656660067.

It is an arithmetic number, because the mean of its divisors is an integer number (656660067).

Almost surely, 2^1313320133 is an apocalyptic number.

It is an amenable number.

1313320133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313320133 is an equidigital number, since it uses as much as digits as its factorization.

1313320133 is an evil number, because the sum of its binary digits is even.

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

The square root of 1313320133 is about 36239.7590085806. The cubic root of 1313320133 is about 1095.1077875310.

Adding to 1313320133 its reverse (3310233131), we get a palindrome (4623553264).

The spelling of 1313320133 in words is "one billion, three hundred thirteen million, three hundred twenty thousand, one hundred thirty-three".