26089909 has 4 divisors (see below), whose sum is σ = 26246304. Its totient is φ = 25933516.

The previous prime is 26089901. The next prime is 26089927. The reversal of 26089909 is 90998062.

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 a cyclic number.

It is not a de Polignac number, because 26089909 - 2³ = 26089901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26089901) 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, 77947 + ... + 78280.

It is an arithmetic number, because the mean of its divisors is an integer number (6561576).

Almost surely, 2^26089909 is an apocalyptic number.

It is an amenable number.

26089909 is a deficient number, since it is larger than the sum of its proper divisors (156395).

26089909 is a wasteful number, since it uses less digits than its factorization.

26089909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156394.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 26089909 is about 5107.8282077611. The cubic root of 26089909 is about 296.5906948221.

The spelling of 26089909 in words is "twenty-six million, eighty-nine thousand, nine hundred nine".