26868689 has 4 divisors (see below), whose sum is σ = 26880420. Its totient is φ = 26856960.

The previous prime is 26868671. The next prime is 26868701. The reversal of 26868689 is 98686862.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98686862 = 2 ⋅49343431.

It can be written as a sum of positive squares in 2 ways, for example, as 1868689 + 25000000 = 1367^2 + 5000^2 .

It is a cyclic number.

It is not a de Polignac number, because 26868689 - 2⁸ = 26868433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26868689.

It is not an unprimeable number, because it can be changed into a prime (26868389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1184 + ... + 7425.

It is an arithmetic number, because the mean of its divisors is an integer number (6720105).

Almost surely, 2^26868689 is an apocalyptic number.

It is an amenable number.

26868689 is a deficient number, since it is larger than the sum of its proper divisors (11731).

26868689 is an equidigital number, since it uses as much as digits as its factorization.

26868689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11730.

The product of its digits is 1990656, while the sum is 53.

The square root of 26868689 is about 5183.5016157034. The cubic root of 26868689 is about 299.5128724135.

The spelling of 26868689 in words is "twenty-six million, eight hundred sixty-eight thousand, six hundred eighty-nine".