268591 has 4 divisors (see below), whose sum is σ = 275184. Its totient is φ = 262000.

The previous prime is 268573. The next prime is 268607. The reversal of 268591 is 195862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 195862 = 2 ⋅97931.

It is a cyclic number.

It is not a de Polignac number, because 268591 - 2¹³ = 260399 is a prime.

It is a super-2 number, since 2×268591² = 144282250562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3235 + ... + 3316.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2²⁶⁸⁵⁹¹ is an apocalyptic number.

268591 is a deficient number, since it is larger than the sum of its proper divisors (6593).

268591 is an equidigital number, since it uses as much as digits as its factorization.

268591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6592.

The product of its digits is 4320, while the sum is 31.

The square root of 268591 is about 518.2576579270. The cubic root of 268591 is about 64.5204149868.

The spelling of 268591 in words is "two hundred sixty-eight thousand, five hundred ninety-one".