1311012617 has 2 divisors, whose sum is σ = 1311012618. Its totient is φ = 1311012616.

The previous prime is 1311012607. The next prime is 1311012641. The reversal of 1311012617 is 7162101131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1023744016 + 287268601 = 31996^2 + 16949^2 .

It is an emirp because it is prime and its reverse (7162101131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311012617 - 2²² = 1306818313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1311012592 and 1311012601.

It is not a weakly prime, because it can be changed into another prime (1311012607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655506308 + 655506309.

It is an arithmetic number, because the mean of its divisors is an integer number (655506309).

Almost surely, 2^1311012617 is an apocalyptic number.

It is an amenable number.

1311012617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311012617 is an equidigital number, since it uses as much as digits as its factorization.

1311012617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 1311012617 is about 36207.9082107763. The cubic root of 1311012617 is about 1094.4660399227.

Adding to 1311012617 its reverse (7162101131), we get a palindrome (8473113748).

The spelling of 1311012617 in words is "one billion, three hundred eleven million, twelve thousand, six hundred seventeen".