242993789 has 4 divisors (see below), whose sum is σ = 245353056. Its totient is φ = 240634524.

The previous prime is 242993771. The next prime is 242993843. The reversal of 242993789 is 987399242.

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 242993789 - 2¹⁶ = 242928253 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242993789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242993759) 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, 1179479 + ... + 1179684.

It is an arithmetic number, because the mean of its divisors is an integer number (61338264).

Almost surely, 2^242993789 is an apocalyptic number.

It is an amenable number.

242993789 is a deficient number, since it is larger than the sum of its proper divisors (2359267).

242993789 is a wasteful number, since it uses less digits than its factorization.

242993789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359266.

The product of its digits is 1959552, while the sum is 53.

The square root of 242993789 is about 15588.2580489290. The cubic root of 242993789 is about 624.0198302445.

The spelling of 242993789 in words is "two hundred forty-two million, nine hundred ninety-three thousand, seven hundred eighty-nine".