243420743 has 4 divisors (see below), whose sum is σ = 249999720. Its totient is φ = 236841768.

The previous prime is 243420673. The next prime is 243420781. The reversal of 243420743 is 347024342.

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 243420743 - 2⁸ = 243420487 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 (243420143) 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, 3289433 + ... + 3289506.

It is an arithmetic number, because the mean of its divisors is an integer number (62499930).

Almost surely, 2^243420743 is an apocalyptic number.

243420743 is a deficient number, since it is larger than the sum of its proper divisors (6578977).

243420743 is an equidigital number, since it uses as much as digits as its factorization.

243420743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6578976.

The product of its (nonzero) digits is 16128, while the sum is 29.

The square root of 243420743 is about 15601.9467695541. The cubic root of 243420743 is about 624.3850959205.

The spelling of 243420743 in words is "two hundred forty-three million, four hundred twenty thousand, seven hundred forty-three".