242605993 has 4 divisors (see below), whose sum is σ = 277264000. Its totient is φ = 207947988.

The previous prime is 242605943. The next prime is 242606009. The reversal of 242605993 is 399506242.

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 242605993 - 2⁹ = 242605481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242605903) 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, 17328993 + ... + 17329006.

It is an arithmetic number, because the mean of its divisors is an integer number (69316000).

Almost surely, 2^242605993 is an apocalyptic number.

It is an amenable number.

242605993 is a deficient number, since it is larger than the sum of its proper divisors (34658007).

242605993 is an equidigital number, since it uses as much as digits as its factorization.

242605993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34658006.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 242605993 is about 15575.8143607325. The cubic root of 242605993 is about 623.6876938526.

The spelling of 242605993 in words is "two hundred forty-two million, six hundred five thousand, nine hundred ninety-three".