242709917 has 4 divisors (see below), whose sum is σ = 243154176. Its totient is φ = 242265660.

The previous prime is 242709913. The next prime is 242709941. The reversal of 242709917 is 719907242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 242709917 - 2² = 242709913 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 (242709913) 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, 221309 + ... + 222402.

It is an arithmetic number, because the mean of its divisors is an integer number (60788544).

Almost surely, 2^242709917 is an apocalyptic number.

It is an amenable number.

242709917 is a deficient number, since it is larger than the sum of its proper divisors (444259).

242709917 is an equidigital number, since it uses as much as digits as its factorization.

242709917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444258.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 242709917 is about 15579.1500730945. The cubic root of 242709917 is about 623.7767365377.

The spelling of 242709917 in words is "two hundred forty-two million, seven hundred nine thousand, nine hundred seventeen".