1313061857 has 2 divisors, whose sum is σ = 1313061858. Its totient is φ = 1313061856.

The previous prime is 1313061853. The next prime is 1313061901. The reversal of 1313061857 is 7581603131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1313047696 + 14161 = 36236^2 + 119^2 .

It is an emirp because it is prime and its reverse (7581603131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313061857 - 2² = 1313061853 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313061853) 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, 656530928 + 656530929.

It is an arithmetic number, because the mean of its divisors is an integer number (656530929).

Almost surely, 2^1313061857 is an apocalyptic number.

It is an amenable number.

1313061857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313061857 is an equidigital number, since it uses as much as digits as its factorization.

1313061857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 1313061857 is about 36236.1953990758. The cubic root of 1313061857 is about 1095.0359952861.

Adding to 1313061857 its reverse (7581603131), we get a palindrome (8894664988).

The spelling of 1313061857 in words is "one billion, three hundred thirteen million, sixty-one thousand, eight hundred fifty-seven".