118242857 has 2 divisors, whose sum is σ = 118242858. Its totient is φ = 118242856.

The previous prime is 118242791. The next prime is 118242863. The reversal of 118242857 is 758242811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91317136 + 26925721 = 9556^2 + 5189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-118242857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 118242857.

It is not a weakly prime, because it can be changed into another prime (118242457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59121428 + 59121429.

It is an arithmetic number, because the mean of its divisors is an integer number (59121429).

Almost surely, 2^118242857 is an apocalyptic number.

It is an amenable number.

118242857 is a deficient number, since it is larger than the sum of its proper divisors (1).

118242857 is an equidigital number, since it uses as much as digits as its factorization.

118242857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 38.

The square root of 118242857 is about 10873.9531450158. The cubic root of 118242857 is about 490.8230745362.

The spelling of 118242857 in words is "one hundred eighteen million, two hundred forty-two thousand, eight hundred fifty-seven".