1340443343 has 4 divisors (see below), whose sum is σ = 1371616488. Its totient is φ = 1309270200.

The previous prime is 1340443297. The next prime is 1340443373. The reversal of 1340443343 is 3433440431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1340443343 - 2¹⁰ = 1340442319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1340443373) 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 in 3 ways as a sum of consecutive naturals, for example, 15586508 + ... + 15586593.

It is an arithmetic number, because the mean of its divisors is an integer number (342904122).

Almost surely, 2^1340443343 is an apocalyptic number.

1340443343 is a deficient number, since it is larger than the sum of its proper divisors (31173145).

1340443343 is an equidigital number, since it uses as much as digits as its factorization.

1340443343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31173144.

The product of its (nonzero) digits is 20736, while the sum is 29.

The square root of 1340443343 is about 36612.0655385626. The cubic root of 1340443343 is about 1102.5953436226.

Adding to 1340443343 its reverse (3433440431), we get a palindrome (4773883774).

The spelling of 1340443343 in words is "one billion, three hundred forty million, four hundred forty-three thousand, three hundred forty-three".