268634869 has 2 divisors, whose sum is σ = 268634870. Its totient is φ = 268634868.

The previous prime is 268634843. The next prime is 268634879. The reversal of 268634869 is 968436862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255040900 + 13593969 = 15970^2 + 3687^2 .

It is a cyclic number.

It is not a de Polignac number, because 268634869 - 2⁷ = 268634741 is a prime.

It is a super-2 number, since 2×268634869² = 144329385685294322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268634879) 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, 134317434 + 134317435.

It is an arithmetic number, because the mean of its divisors is an integer number (134317435).

Almost surely, 2^268634869 is an apocalyptic number.

It is an amenable number.

268634869 is a deficient number, since it is larger than the sum of its proper divisors (1).

268634869 is an equidigital number, since it uses as much as digits as its factorization.

268634869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984, while the sum is 52.

The square root of 268634869 is about 16390.0844720215. The cubic root of 268634869 is about 645.2392750457.

The spelling of 268634869 in words is "two hundred sixty-eight million, six hundred thirty-four thousand, eight hundred sixty-nine".