242743439 has 4 divisors (see below), whose sum is σ = 243688224. Its totient is φ = 241798656.

The previous prime is 242743429. The next prime is 242743441. The reversal of 242743439 is 934347242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242743439 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 (242743429) 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, 472007 + ... + 472520.

It is an arithmetic number, because the mean of its divisors is an integer number (60922056).

Almost surely, 2^242743439 is an apocalyptic number.

242743439 is a deficient number, since it is larger than the sum of its proper divisors (944785).

242743439 is an equidigital number, since it uses as much as digits as its factorization.

242743439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944784.

The product of its digits is 145152, while the sum is 38.

The square root of 242743439 is about 15580.2258969503. The cubic root of 242743439 is about 623.8054529597.

The spelling of 242743439 in words is "two hundred forty-two million, seven hundred forty-three thousand, four hundred thirty-nine".