1340218843 has 2 divisors, whose sum is σ = 1340218844. Its totient is φ = 1340218842.

The previous prime is 1340218769. The next prime is 1340218909. The reversal of 1340218843 is 3488120431.

It is a strong prime.

It is an emirp because it is prime and its reverse (3488120431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1340218843 - 2²¹ = 1338121691 is a prime.

It is a super-4 number, since 4×1340218843⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1340218799 and 1340218808.

It is not a weakly prime, because it can be changed into another prime (1340218043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670109421 + 670109422.

It is an arithmetic number, because the mean of its divisors is an integer number (670109422).

Almost surely, 2^1340218843 is an apocalyptic number.

1340218843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340218843 is an equidigital number, since it uses as much as digits as its factorization.

1340218843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 1340218843 is about 36608.9994810019. Note that the first 3 decimals coincide. The cubic root of 1340218843 is about 1102.5337852643.

The spelling of 1340218843 in words is "one billion, three hundred forty million, two hundred eighteen thousand, eight hundred forty-three".