268128769 has 2 divisors, whose sum is σ = 268128770. Its totient is φ = 268128768.

The previous prime is 268128767. The next prime is 268128799. The reversal of 268128769 is 967821862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158130625 + 109998144 = 12575^2 + 10488^2 .

It is a cyclic number.

It is not a de Polignac number, because 268128769 - 2¹ = 268128767 is a prime.

It is a super-2 number, since 2×268128769² = 143786073530910722, which contains 22 as substring.

Together with 268128767, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268128767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134064384 + 134064385.

It is an arithmetic number, because the mean of its divisors is an integer number (134064385).

Almost surely, 2^268128769 is an apocalyptic number.

It is an amenable number.

268128769 is a deficient number, since it is larger than the sum of its proper divisors (1).

268128769 is an equidigital number, since it uses as much as digits as its factorization.

268128769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 268128769 is about 16374.6379807311. The cubic root of 268128769 is about 644.8338165301.

The spelling of 268128769 in words is "two hundred sixty-eight million, one hundred twenty-eight thousand, seven hundred sixty-nine".