268189 has 2 divisors, whose sum is σ = 268190. Its totient is φ = 268188.

The previous prime is 268171. The next prime is 268199. The reversal of 268189 is 981862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267289 + 900 = 517^2 + 30^2 .

It is a cyclic number.

It is not a de Polignac number, because 268189 - 2⁹ = 267677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134094 + 134095.

It is an arithmetic number, because the mean of its divisors is an integer number (134095).

2²⁶⁸¹⁸⁹ is an apocalyptic number.

It is an amenable number.

268189 is a deficient number, since it is larger than the sum of its proper divisors (1).

268189 is an equidigital number, since it uses as much as digits as its factorization.

268189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 34.

The square root of 268189 is about 517.8696747252. The cubic root of 268189 is about 64.4882096912.

The spelling of 268189 in words is "two hundred sixty-eight thousand, one hundred eighty-nine".