268819 has 2 divisors, whose sum is σ = 268820. Its totient is φ = 268818.

The previous prime is 268817. The next prime is 268823. The reversal of 268819 is 918862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268819 - 2¹ = 268817 is a prime.

It is a super-2 number, since 2×268819² = 144527309522, which contains 22 as substring.

Together with 268817, it forms a pair of twin primes.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134409 + 134410.

It is an arithmetic number, because the mean of its divisors is an integer number (134410).

2²⁶⁸⁸¹⁹ is an apocalyptic number.

268819 is a deficient number, since it is larger than the sum of its proper divisors (1).

268819 is an equidigital number, since it uses as much as digits as its factorization.

268819 is an odious number, because the sum of its binary digits is odd.

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

The square root of 268819 is about 518.4775790717. The cubic root of 268819 is about 64.5386663976.

The spelling of 268819 in words is "two hundred sixty-eight thousand, eight hundred nineteen".