1313219857 has 2 divisors, whose sum is σ = 1313219858. Its totient is φ = 1313219856.

The previous prime is 1313219851. The next prime is 1313219863. The reversal of 1313219857 is 7589123131.

It is a balanced prime because it is at equal distance from previous prime (1313219851) and next prime (1313219863).

It can be written as a sum of positive squares in only one way, i.e., 1021185936 + 292033921 = 31956^2 + 17089^2 .

It is an emirp because it is prime and its reverse (7589123131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1313219857 - 2¹¹ = 1313217809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313219851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656609928 + 656609929.

It is an arithmetic number, because the mean of its divisors is an integer number (656609929).

Almost surely, 2^1313219857 is an apocalyptic number.

It is an amenable number.

1313219857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313219857 is an equidigital number, since it uses as much as digits as its factorization.

1313219857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 40.

The square root of 1313219857 is about 36238.3754740744. The cubic root of 1313219857 is about 1095.0799152145.

The spelling of 1313219857 in words is "one billion, three hundred thirteen million, two hundred nineteen thousand, eight hundred fifty-seven".