268128767 has 2 divisors, whose sum is σ = 268128768. Its totient is φ = 268128766.

The previous prime is 268128739. The next prime is 268128769. The reversal of 268128767 is 767821862.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 268128767 - 2¹⁸ = 267866623 is a prime.

Together with 268128769, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268128769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134064383 + 134064384.

It is an arithmetic number, because the mean of its divisors is an integer number (134064384).

Almost surely, 2^268128767 is an apocalyptic number.

268128767 is a deficient number, since it is larger than the sum of its proper divisors (1).

268128767 is an equidigital number, since it uses as much as digits as its factorization.

268128767 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 47.

The square root of 268128767 is about 16374.6379196610. The cubic root of 268128767 is about 644.8338149268.

The spelling of 268128767 in words is "two hundred sixty-eight million, one hundred twenty-eight thousand, seven hundred sixty-seven".