268547689 has 2 divisors, whose sum is σ = 268547690. Its totient is φ = 268547688.

The previous prime is 268547687. The next prime is 268547693. The reversal of 268547689 is 986745862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199939600 + 68608089 = 14140^2 + 8283^2 .

It is a cyclic number.

It is not a de Polignac number, because 268547689 - 2¹ = 268547687 is a prime.

It is a super-2 number, since 2×268547689² = 144235722534481442, which contains 22 as substring.

Together with 268547687, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (268547687) 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, 134273844 + 134273845.

It is an arithmetic number, because the mean of its divisors is an integer number (134273845).

Almost surely, 2^268547689 is an apocalyptic number.

It is an amenable number.

268547689 is a deficient number, since it is larger than the sum of its proper divisors (1).

268547689 is an equidigital number, since it uses as much as digits as its factorization.

268547689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 55.

The square root of 268547689 is about 16387.4247214137. The cubic root of 268547689 is about 645.1694677189.

It can be divided in two parts, 26854 and 7689, that added together give a palindrome (34543).

The spelling of 268547689 in words is "two hundred sixty-eight million, five hundred forty-seven thousand, six hundred eighty-nine".