1313585857 has 2 divisors, whose sum is σ = 1313585858. Its totient is φ = 1313585856.

The previous prime is 1313585831. The next prime is 1313585893. The reversal of 1313585857 is 7585853131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1298809521 + 14776336 = 36039^2 + 3844^2 .

It is an emirp because it is prime and its reverse (7585853131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313585857 - 2¹¹ = 1313583809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313585057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656792928 + 656792929.

It is an arithmetic number, because the mean of its divisors is an integer number (656792929).

Almost surely, 2^1313585857 is an apocalyptic number.

It is an amenable number.

1313585857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313585857 is an equidigital number, since it uses as much as digits as its factorization.

1313585857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504000, while the sum is 46.

The square root of 1313585857 is about 36243.4250175118. The cubic root of 1313585857 is about 1095.1816402525.

The spelling of 1313585857 in words is "one billion, three hundred thirteen million, five hundred eighty-five thousand, eight hundred fifty-seven".