26979009 has 4 divisors (see below), whose sum is σ = 35972016. Its totient is φ = 17986004.

The previous prime is 26978981. The next prime is 26979061. The reversal of 26979009 is 90097962.

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 26979009 - 2¹⁷ = 26847937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26979079) 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, 4496499 + ... + 4496504.

It is an arithmetic number, because the mean of its divisors is an integer number (8993004).

Almost surely, 2^26979009 is an apocalyptic number.

It is an amenable number.

26979009 is a deficient number, since it is larger than the sum of its proper divisors (8993007).

26979009 is an equidigital number, since it uses as much as digits as its factorization.

26979009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8993006.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 26979009 is about 5194.1321700550. The cubic root of 26979009 is about 299.9222353995.

The spelling of 26979009 in words is "twenty-six million, nine hundred seventy-nine thousand, nine".