242192789 has 2 divisors, whose sum is σ = 242192790. Its totient is φ = 242192788.

The previous prime is 242192779. The next prime is 242192803. The reversal of 242192789 is 987291242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 162358564 + 79834225 = 12742^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 242192789 - 2⁴ = 242192773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242192759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121096394 + 121096395.

It is an arithmetic number, because the mean of its divisors is an integer number (121096395).

Almost surely, 2^242192789 is an apocalyptic number.

It is an amenable number.

242192789 is a deficient number, since it is larger than the sum of its proper divisors (1).

242192789 is an equidigital number, since it uses as much as digits as its factorization.

242192789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 242192789 is about 15562.5444256394. The cubic root of 242192789 is about 623.3334065092. Note that the first 3 decimals are identical.

The spelling of 242192789 in words is "two hundred forty-two million, one hundred ninety-two thousand, seven hundred eighty-nine".