242743928177 has 2 divisors, whose sum is σ = 242743928178. Its totient is φ = 242743928176.

The previous prime is 242743928171. The next prime is 242743928191. The reversal of 242743928177 is 771829347242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203523690496 + 39220237681 = 451136^2 + 198041^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242743928177 is a prime.

It is a super-2 number, since 2×242743928177² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242743928171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121371964088 + 121371964089.

It is an arithmetic number, because the mean of its divisors is an integer number (121371964089).

Almost surely, 2^242743928177 is an apocalyptic number.

It is an amenable number.

242743928177 is a deficient number, since it is larger than the sum of its proper divisors (1).

242743928177 is an equidigital number, since it uses as much as digits as its factorization.

242743928177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9483264, while the sum is 56.

The spelling of 242743928177 in words is "two hundred forty-two billion, seven hundred forty-three million, nine hundred twenty-eight thousand, one hundred seventy-seven".