242791148189 has 2 divisors, whose sum is σ = 242791148190. Its totient is φ = 242791148188.

The previous prime is 242791148129. The next prime is 242791148191. The reversal of 242791148189 is 981841197242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242572995289 + 218152900 = 492517^2 + 14770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242791148189 is a prime.

Together with 242791148191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242791148129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121395574094 + 121395574095.

It is an arithmetic number, because the mean of its divisors is an integer number (121395574095).

Almost surely, 2^242791148189 is an apocalyptic number.

It is an amenable number.

242791148189 is a deficient number, since it is larger than the sum of its proper divisors (1).

242791148189 is an equidigital number, since it uses as much as digits as its factorization.

242791148189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 56.

The spelling of 242791148189 in words is "two hundred forty-two billion, seven hundred ninety-one million, one hundred forty-eight thousand, one hundred eighty-nine".