1318313 has 2 divisors, whose sum is σ = 1318314. Its totient is φ = 1318312.

The previous prime is 1318301. The next prime is 1318349. The reversal of 1318313 is 3138131.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1315609 + 2704 = 1147^2 + 52^2 .

It is an emirp because it is prime and its reverse (3138131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1318313 - 2⁶ = 1318249 is a prime.

It is not a weakly prime, because it can be changed into another prime (1318013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659156 + 659157.

It is an arithmetic number, because the mean of its divisors is an integer number (659157).

2^1318313 is an apocalyptic number.

It is an amenable number.

1318313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318313 is an equidigital number, since it uses as much as digits as its factorization.

1318313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 20.

The square root of 1318313 is about 1148.1781220699. The cubic root of 1318313 is about 109.6493794665.

The spelling of 1318313 in words is "one million, three hundred eighteen thousand, three hundred thirteen".