242689047 has 4 divisors (see below), whose sum is σ = 323585400. Its totient is φ = 161792696.

The previous prime is 242689039. The next prime is 242689063. The reversal of 242689047 is 740986242.

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 242689047 - 2³ = 242689039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242689037) 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, 40448172 + ... + 40448177.

It is an arithmetic number, because the mean of its divisors is an integer number (80896350).

Almost surely, 2^242689047 is an apocalyptic number.

242689047 is a deficient number, since it is larger than the sum of its proper divisors (80896353).

242689047 is an equidigital number, since it uses as much as digits as its factorization.

242689047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80896352.

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 242689047 is about 15578.4802532211. The cubic root of 242689047 is about 623.7588570408.

The spelling of 242689047 in words is "two hundred forty-two million, six hundred eighty-nine thousand, forty-seven".