268999 has 2 divisors, whose sum is σ = 269000. Its totient is φ = 268998.

The previous prime is 268997. The next prime is 269023. The reversal of 268999 is 999862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268999 - 2¹ = 268997 is a prime.

Together with 268997, it forms a pair of twin primes.

268999 is a modest number, since divided by 999 gives 268 as remainder.

It is a plaindrome in base 10.

It is a nialpdrome in base 6.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134499 + 134500.

It is an arithmetic number, because the mean of its divisors is an integer number (134500).

2²⁶⁸⁹⁹⁹ is an apocalyptic number.

268999 is a deficient number, since it is larger than the sum of its proper divisors (1).

268999 is an equidigital number, since it uses as much as digits as its factorization.

268999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 268999 is about 518.6511351573. The cubic root of 268999 is about 64.5530681178.

It can be divided in two parts, 26 and 8999, that added together give a square (9025 = 95²).

The spelling of 268999 in words is "two hundred sixty-eight thousand, nine hundred ninety-nine".