268143289 has 4 divisors (see below), whose sum is σ = 268332624. Its totient is φ = 267953956.

The previous prime is 268143277. The next prime is 268143311. The reversal of 268143289 is 982341862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 982341862 = 2 ⋅491170931.

It is a cyclic number.

It is not a de Polignac number, because 268143289 - 2¹¹ = 268141241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268173289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92527 + ... + 95380.

It is an arithmetic number, because the mean of its divisors is an integer number (67083156).

Almost surely, 2^268143289 is an apocalyptic number.

It is an amenable number.

268143289 is a deficient number, since it is larger than the sum of its proper divisors (189335).

268143289 is a wasteful number, since it uses less digits than its factorization.

268143289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189334.

The product of its digits is 165888, while the sum is 43.

The square root of 268143289 is about 16375.0813433094. The cubic root of 268143289 is about 644.8454562335.

It can be divided in two parts, 26814 and 3289, that added together give a palindrome (30103).

The spelling of 268143289 in words is "two hundred sixty-eight million, one hundred forty-three thousand, two hundred eighty-nine".