26813689 has 4 divisors (see below), whose sum is σ = 30644224. Its totient is φ = 22983156.

The previous prime is 26813629. The next prime is 26813701. The reversal of 26813689 is 98631862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 26813689 - 2¹³ = 26805497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26813609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1915257 + ... + 1915270.

It is an arithmetic number, because the mean of its divisors is an integer number (7661056).

Almost surely, 2^26813689 is an apocalyptic number.

It is an amenable number.

26813689 is a deficient number, since it is larger than the sum of its proper divisors (3830535).

26813689 is an equidigital number, since it uses as much as digits as its factorization.

26813689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830534.

The product of its digits is 124416, while the sum is 43.

The square root of 26813689 is about 5178.1936039511. The cubic root of 26813689 is about 299.3083659591.

The spelling of 26813689 in words is "twenty-six million, eight hundred thirteen thousand, six hundred eighty-nine".