26243689 has 4 divisors (see below), whose sum is σ = 26266240. Its totient is φ = 26221140.

The previous prime is 26243681. The next prime is 26243729. The reversal of 26243689 is 98634262.

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, and also an emirpimes, since its reverse is a distinct semiprime: 98634262 = 2 ⋅49317131.

It is a cyclic number.

It is not a de Polignac number, because 26243689 - 2³ = 26243681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26243681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9429 + ... + 11890.

It is an arithmetic number, because the mean of its divisors is an integer number (6566560).

Almost surely, 2^26243689 is an apocalyptic number.

It is an amenable number.

26243689 is a deficient number, since it is larger than the sum of its proper divisors (22551).

26243689 is a wasteful number, since it uses less digits than its factorization.

26243689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22550.

The product of its digits is 124416, while the sum is 40.

The square root of 26243689 is about 5122.8594554214. The cubic root of 26243689 is about 297.1722785283.

The spelling of 26243689 in words is "twenty-six million, two hundred forty-three thousand, six hundred eighty-nine".