26819 has 4 divisors (see below), whose sum is σ = 28896. Its totient is φ = 24744.

The previous prime is 26813. The next prime is 26821. The reversal of 26819 is 91862.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26819 is a prime.

It is a super-2 number, since 2×26819² = 1438517522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26813) 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 in 3 ways as a sum of consecutive naturals, for example, 1019 + ... + 1044.

It is an arithmetic number, because the mean of its divisors is an integer number (7224).

2²⁶⁸¹⁹ is an apocalyptic number.

26819 is a deficient number, since it is larger than the sum of its proper divisors (2077).

26819 is a wasteful number, since it uses less digits than its factorization.

26819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076.

The product of its digits is 864, while the sum is 26.

The square root of 26819 is about 163.7650756419. The cubic root of 26819 is about 29.9328126038.

The spelling of 26819 in words is "twenty-six thousand, eight hundred nineteen".