268818149 has 2 divisors, whose sum is σ = 268818150. Its totient is φ = 268818148.

The previous prime is 268818097. The next prime is 268818169. The reversal of 268818149 is 941818862.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262213249 + 6604900 = 16193^2 + 2570^2 .

It is a cyclic number.

It is not a de Polignac number, because 268818149 - 2⁸ = 268817893 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268818169) 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, 134409074 + 134409075.

It is an arithmetic number, because the mean of its divisors is an integer number (134409075).

Almost surely, 2^268818149 is an apocalyptic number.

It is an amenable number.

268818149 is a deficient number, since it is larger than the sum of its proper divisors (1).

268818149 is an equidigital number, since it uses as much as digits as its factorization.

268818149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 221184, while the sum is 47.

The square root of 268818149 is about 16395.6747040187. The cubic root of 268818149 is about 645.3859829423.

The spelling of 268818149 in words is "two hundred sixty-eight million, eight hundred eighteen thousand, one hundred forty-nine".