268861 has 2 divisors, whose sum is σ = 268862. Its totient is φ = 268860.

The previous prime is 268843. The next prime is 268883. The reversal of 268861 is 168862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220900 + 47961 = 470^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 268861 - 2⁷ = 268733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134430 + 134431.

It is an arithmetic number, because the mean of its divisors is an integer number (134431).

2²⁶⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

268861 is a deficient number, since it is larger than the sum of its proper divisors (1).

268861 is an equidigital number, since it uses as much as digits as its factorization.

268861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 31.

The square root of 268861 is about 518.5180806876. The cubic root of 268861 is about 64.5420273739.

Subtracting from 268861 its reverse (168862), we obtain a palindrome (99999).

The spelling of 268861 in words is "two hundred sixty-eight thousand, eight hundred sixty-one".