1243456343 has 4 divisors (see below), whose sum is σ = 1244420808. Its totient is φ = 1242491880.

The previous prime is 1243456297. The next prime is 1243456367. The reversal of 1243456343 is 3436543421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3436543421 = 17 ⋅202149613.

It is a cyclic number.

It is not a de Polignac number, because 1243456343 - 2⁸ = 1243456087 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 (1243456243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480296 + ... + 482877.

It is an arithmetic number, because the mean of its divisors is an integer number (311105202).

Almost surely, 2^1243456343 is an apocalyptic number.

1243456343 is a deficient number, since it is larger than the sum of its proper divisors (964465).

1243456343 is an equidigital number, since it uses as much as digits as its factorization.

1243456343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964464.

The product of its digits is 103680, while the sum is 35.

The square root of 1243456343 is about 35262.6763448267. The cubic root of 1243456343 is about 1075.3343378306.

Adding to 1243456343 its reverse (3436543421), we get a palindrome (4679999764).

The spelling of 1243456343 in words is "one billion, two hundred forty-three million, four hundred fifty-six thousand, three hundred forty-three".