242743913 has 2 divisors, whose sum is σ = 242743914. Its totient is φ = 242743912.

The previous prime is 242743873. The next prime is 242743931. The reversal of 242743913 is 319347242.

Together with next prime (242743931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163123984 + 79619929 = 12772^2 + 8923^2 .

It is a cyclic number.

It is not a de Polignac number, because 242743913 - 2¹⁰ = 242742889 is a prime.

It is not a weakly prime, because it can be changed into another prime (242743993) 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 as a sum of consecutive naturals, namely, 121371956 + 121371957.

It is an arithmetic number, because the mean of its divisors is an integer number (121371957).

Almost surely, 2^242743913 is an apocalyptic number.

It is an amenable number.

242743913 is a deficient number, since it is larger than the sum of its proper divisors (1).

242743913 is an equidigital number, since it uses as much as digits as its factorization.

242743913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 242743913 is about 15580.2411085323. The cubic root of 242743913 is about 623.8058589900.

The spelling of 242743913 in words is "two hundred forty-two million, seven hundred forty-three thousand, nine hundred thirteen".