1312115653 has 2 divisors, whose sum is σ = 1312115654. Its totient is φ = 1312115652.

The previous prime is 1312115639. The next prime is 1312115663. The reversal of 1312115653 is 3565112131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1312033284 + 82369 = 36222^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312115653 - 2⁵ = 1312115621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312115603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656057826 + 656057827.

It is an arithmetic number, because the mean of its divisors is an integer number (656057827).

Almost surely, 2^1312115653 is an apocalyptic number.

It is an amenable number.

1312115653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312115653 is an equidigital number, since it uses as much as digits as its factorization.

1312115653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 28.

The square root of 1312115653 is about 36223.1369845297. The cubic root of 1312115653 is about 1094.7729012021.

Adding to 1312115653 its reverse (3565112131), we get a palindrome (4877227784).

The spelling of 1312115653 in words is "one billion, three hundred twelve million, one hundred fifteen thousand, six hundred fifty-three".