26993 has 2 divisors, whose sum is σ = 26994. Its totient is φ = 26992.

The previous prime is 26987. The next prime is 27011. The reversal of 26993 is 39962.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16384 + 10609 = 128^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 26993 - 2⁸ = 26737 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13496 + 13497.

It is an arithmetic number, because the mean of its divisors is an integer number (13497).

2²⁶⁹⁹³ is an apocalyptic number.

It is an amenable number.

26993 is a deficient number, since it is larger than the sum of its proper divisors (1).

26993 is an equidigital number, since it uses as much as digits as its factorization.

26993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 26993 is about 164.2954655491. The cubic root of 26993 is about 29.9974071833.

The spelling of 26993 in words is "twenty-six thousand, nine hundred ninety-three".