268439189 has 2 divisors, whose sum is σ = 268439190. Its totient is φ = 268439188.

The previous prime is 268439183. The next prime is 268439207. The reversal of 268439189 is 981934862.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220760164 + 47679025 = 14858^2 + 6905^2 .

It is a cyclic number.

It is not a de Polignac number, because 268439189 - 2²⁸ = 3733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268439183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134219594 + 134219595.

It is an arithmetic number, because the mean of its divisors is an integer number (134219595).

Almost surely, 2^268439189 is an apocalyptic number.

It is an amenable number.

268439189 is a deficient number, since it is larger than the sum of its proper divisors (1).

268439189 is an equidigital number, since it uses as much as digits as its factorization.

268439189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 268439189 is about 16384.1139217231. The cubic root of 268439189 is about 645.0825678006.

The spelling of 268439189 in words is "two hundred sixty-eight million, four hundred thirty-nine thousand, one hundred eighty-nine".