242605663 has 4 divisors (see below), whose sum is σ = 244151080. Its totient is φ = 241060248.

The previous prime is 242605639. The next prime is 242605667. The reversal of 242605663 is 366506242.

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 242605663 - 2⁹ = 242605151 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 (242605667) 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, 772473 + ... + 772786.

It is an arithmetic number, because the mean of its divisors is an integer number (61037770).

Almost surely, 2^242605663 is an apocalyptic number.

242605663 is a deficient number, since it is larger than the sum of its proper divisors (1545417).

242605663 is a wasteful number, since it uses less digits than its factorization.

242605663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545416.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 242605663 is about 15575.8037673823. The cubic root of 242605663 is about 623.6874110662.

The spelling of 242605663 in words is "two hundred forty-two million, six hundred five thousand, six hundred sixty-three".