268218659 has 4 divisors (see below), whose sum is σ = 268769904. Its totient is φ = 267667416.

The previous prime is 268218631. The next prime is 268218683. The reversal of 268218659 is 956812862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 956812862 = 2 ⋅478406431.

It is a cyclic number.

It is not a de Polignac number, because 268218659 - 2¹² = 268214563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268218859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274892 + ... + 275865.

It is an arithmetic number, because the mean of its divisors is an integer number (67192476).

Almost surely, 2^268218659 is an apocalyptic number.

268218659 is a deficient number, since it is larger than the sum of its proper divisors (551245).

268218659 is an equidigital number, since it uses as much as digits as its factorization.

268218659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551244.

The product of its digits is 414720, while the sum is 47.

The square root of 268218659 is about 16377.3825442285. The cubic root of 268218659 is about 644.9058685218.

The spelling of 268218659 in words is "two hundred sixty-eight million, two hundred eighteen thousand, six hundred fifty-nine".