1340323013 has 2 divisors, whose sum is σ = 1340323014. Its totient is φ = 1340323012.

The previous prime is 1340323009. The next prime is 1340323043. The reversal of 1340323013 is 3103230431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1195914724 + 144408289 = 34582^2 + 12017^2 .

It is a cyclic number.

It is not a de Polignac number, because 1340323013 - 2² = 1340323009 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340323003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670161506 + 670161507.

It is an arithmetic number, because the mean of its divisors is an integer number (670161507).

Almost surely, 2^1340323013 is an apocalyptic number.

It is an amenable number.

1340323013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340323013 is an equidigital number, since it uses as much as digits as its factorization.

1340323013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1340323013 is about 36610.4221909554. The cubic root of 1340323013 is about 1102.5623497457.

Adding to 1340323013 its reverse (3103230431), we get a palindrome (4443553444).

The spelling of 1340323013 in words is "one billion, three hundred forty million, three hundred twenty-three thousand, thirteen".