1313023013 has 2 divisors, whose sum is σ = 1313023014. Its totient is φ = 1313023012.

The previous prime is 1313023009. The next prime is 1313023021. The reversal of 1313023013 is 3103203131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 755260324 + 557762689 = 27482^2 + 23617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313023013 - 2² = 1313023009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1313022982 and 1313023000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313023003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656511506 + 656511507.

It is an arithmetic number, because the mean of its divisors is an integer number (656511507).

Almost surely, 2^1313023013 is an apocalyptic number.

It is an amenable number.

1313023013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313023013 is an equidigital number, since it uses as much as digits as its factorization.

1313023013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1313023013 is about 36235.6594116900. The cubic root of 1313023013 is about 1095.0251971155.

Adding to 1313023013 its reverse (3103203131), we get a palindrome (4416226144).

The spelling of 1313023013 in words is "one billion, three hundred thirteen million, twenty-three thousand, thirteen".