1340053243 has 2 divisors, whose sum is σ = 1340053244. Its totient is φ = 1340053242.

The previous prime is 1340053241. The next prime is 1340053277. The reversal of 1340053243 is 3423500431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1340053243 - 2¹ = 1340053241 is a prime.

Together with 1340053241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1340053241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670026621 + 670026622.

It is an arithmetic number, because the mean of its divisors is an integer number (670026622).

Almost surely, 2^1340053243 is an apocalyptic number.

1340053243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340053243 is an equidigital number, since it uses as much as digits as its factorization.

1340053243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 1340053243 is about 36606.7376721827. The cubic root of 1340053243 is about 1102.4883730004.

Adding to 1340053243 its reverse (3423500431), we get a palindrome (4763553674).

The spelling of 1340053243 in words is "one billion, three hundred forty million, fifty-three thousand, two hundred forty-three".