1340013443 has 2 divisors, whose sum is σ = 1340013444. Its totient is φ = 1340013442.

The previous prime is 1340013431. The next prime is 1340013463. The reversal of 1340013443 is 3443100431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340013443 - 2⁶ = 1340013379 is a prime.

It is not a weakly prime, because it can be changed into another prime (1340013403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670006721 + 670006722.

It is an arithmetic number, because the mean of its divisors is an integer number (670006722).

Almost surely, 2^1340013443 is an apocalyptic number.

1340013443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340013443 is an equidigital number, since it uses as much as digits as its factorization.

1340013443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1340013443 is about 36606.1940523732. The cubic root of 1340013443 is about 1102.4774581426.

Adding to 1340013443 its reverse (3443100431), we get a palindrome (4783113874).

The spelling of 1340013443 in words is "one billion, three hundred forty million, thirteen thousand, four hundred forty-three".