1236513013 has 2 divisors, whose sum is σ = 1236513014. Its totient is φ = 1236513012.

The previous prime is 1236513007. The next prime is 1236513017. The reversal of 1236513013 is 3103156321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1064194884 + 172318129 = 32622^2 + 13127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236513013 - 2¹⁷ = 1236381941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236513017) 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, 618256506 + 618256507.

It is an arithmetic number, because the mean of its divisors is an integer number (618256507).

Almost surely, 2^1236513013 is an apocalyptic number.

It is an amenable number.

1236513013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236513013 is an equidigital number, since it uses as much as digits as its factorization.

1236513013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1236513013 is about 35164.0869780519. The cubic root of 1236513013 is about 1073.3290826982.

Adding to 1236513013 its reverse (3103156321), we get a palindrome (4339669334).

The spelling of 1236513013 in words is "one billion, two hundred thirty-six million, five hundred thirteen thousand, thirteen".