1343440243 has 4 divisors (see below), whose sum is σ = 1361843608. Its totient is φ = 1325036880.

The previous prime is 1343440229. The next prime is 1343440247. The reversal of 1343440243 is 3420443431.

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 1343440243 - 2⁹ = 1343439731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1343440247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9201573 + ... + 9201718.

It is an arithmetic number, because the mean of its divisors is an integer number (340460902).

Almost surely, 2^1343440243 is an apocalyptic number.

1343440243 is a deficient number, since it is larger than the sum of its proper divisors (18403365).

1343440243 is an equidigital number, since it uses as much as digits as its factorization.

1343440243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18403364.

The product of its (nonzero) digits is 13824, while the sum is 28.

The square root of 1343440243 is about 36652.9704526113. The cubic root of 1343440243 is about 1103.4164422224.

Adding to 1343440243 its reverse (3420443431), we get a palindrome (4763883674).

The spelling of 1343440243 in words is "one billion, three hundred forty-three million, four hundred forty thousand, two hundred forty-three".