242678173 has 2 divisors, whose sum is σ = 242678174. Its totient is φ = 242678172.

The previous prime is 242678159. The next prime is 242678201. The reversal of 242678173 is 371876242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213539769 + 29138404 = 14613^2 + 5398^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242678173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242678123) 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, 121339086 + 121339087.

It is an arithmetic number, because the mean of its divisors is an integer number (121339087).

Almost surely, 2^242678173 is an apocalyptic number.

It is an amenable number.

242678173 is a deficient number, since it is larger than the sum of its proper divisors (1).

242678173 is an equidigital number, since it uses as much as digits as its factorization.

242678173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 242678173 is about 15578.1312422254. The cubic root of 242678173 is about 623.7495407913.

The spelling of 242678173 in words is "two hundred forty-two million, six hundred seventy-eight thousand, one hundred seventy-three".