1313230993 has 2 divisors, whose sum is σ = 1313230994. Its totient is φ = 1313230992.

The previous prime is 1313230991. The next prime is 1313231033. The reversal of 1313230993 is 3990323131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1303787664 + 9443329 = 36108^2 + 3073^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313230993 - 2¹ = 1313230991 is a prime.

Together with 1313230991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1313230991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656615496 + 656615497.

It is an arithmetic number, because the mean of its divisors is an integer number (656615497).

Almost surely, 2^1313230993 is an apocalyptic number.

It is an amenable number.

1313230993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313230993 is an equidigital number, since it uses as much as digits as its factorization.

1313230993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 34.

The square root of 1313230993 is about 36238.5291230204. The cubic root of 1313230993 is about 1095.0830106026.

The spelling of 1313230993 in words is "one billion, three hundred thirteen million, two hundred thirty thousand, nine hundred ninety-three".