268789 has 2 divisors, whose sum is σ = 268790. Its totient is φ = 268788.

The previous prime is 268783. The next prime is 268811. The reversal of 268789 is 987862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140625 + 128164 = 375^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 268789 - 2³ = 268781 is a prime.

It is a Chen prime.

268789 is a lucky number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134394 + 134395.

It is an arithmetic number, because the mean of its divisors is an integer number (134395).

2²⁶⁸⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

268789 is a deficient number, since it is larger than the sum of its proper divisors (1).

268789 is an equidigital number, since it uses as much as digits as its factorization.

268789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 268789 is about 518.4486474088. The cubic root of 268789 is about 64.5362654860.

The spelling of 268789 in words is "two hundred sixty-eight thousand, seven hundred eighty-nine".