268878173 has 2 divisors, whose sum is σ = 268878174. Its totient is φ = 268878172.

The previous prime is 268878161. The next prime is 268878187. The reversal of 268878173 is 371878862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217798564 + 51079609 = 14758^2 + 7147^2 .

It is a cyclic number.

It is not a de Polignac number, because 268878173 - 2⁶ = 268878109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268878133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134439086 + 134439087.

It is an arithmetic number, because the mean of its divisors is an integer number (134439087).

Almost surely, 2^268878173 is an apocalyptic number.

It is an amenable number.

268878173 is a deficient number, since it is larger than the sum of its proper divisors (1).

268878173 is an equidigital number, since it uses as much as digits as its factorization.

268878173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 903168, while the sum is 50.

The square root of 268878173 is about 16397.5050846158. The cubic root of 268878173 is about 645.4340151225.

The spelling of 268878173 in words is "two hundred sixty-eight million, eight hundred seventy-eight thousand, one hundred seventy-three".