243742459 has 2 divisors, whose sum is σ = 243742460. Its totient is φ = 243742458.

The previous prime is 243742441. The next prime is 243742463. The reversal of 243742459 is 954247342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243742459 - 2⁵ = 243742427 is a prime.

It is not a weakly prime, because it can be changed into another prime (243742409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121871229 + 121871230.

It is an arithmetic number, because the mean of its divisors is an integer number (121871230).

Almost surely, 2^243742459 is an apocalyptic number.

243742459 is a deficient number, since it is larger than the sum of its proper divisors (1).

243742459 is an equidigital number, since it uses as much as digits as its factorization.

243742459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 40.

The square root of 243742459 is about 15612.2534888465. The cubic root of 243742459 is about 624.6600468044.

The spelling of 243742459 in words is "two hundred forty-three million, seven hundred forty-two thousand, four hundred fifty-nine".