268981 has 8 divisors (see below), whose sum is σ = 282240. Its totient is φ = 256128.

The previous prime is 268979. The next prime is 268993. The reversal of 268981 is 189862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 268981 - 2¹ = 268979 is a prime.

It is a super-2 number, since 2×268981² = 144701556722, 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 (268921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2725 + ... + 2821.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2²⁶⁸⁹⁸¹ is an apocalyptic number.

It is an amenable number.

268981 is a deficient number, since it is larger than the sum of its proper divisors (13259).

268981 is an equidigital number, since it uses as much as digits as its factorization.

268981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203.

The product of its digits is 6912, while the sum is 34.

The square root of 268981 is about 518.6337821623. The cubic root of 268981 is about 64.5516282349.

The spelling of 268981 in words is "two hundred sixty-eight thousand, nine hundred eighty-one".