26009979 has 4 divisors (see below), whose sum is σ = 34679976. Its totient is φ = 17339984.

The previous prime is 26009947. The next prime is 26009989. The reversal of 26009979 is 97990062.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26009979 - 2⁵ = 26009947 is a prime.

It is a super-3 number, since 3×26009979³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26009979.

It is not an unprimeable number, because it can be changed into a prime (26009989) 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, 4334994 + ... + 4334999.

It is an arithmetic number, because the mean of its divisors is an integer number (8669994).

Almost surely, 2^26009979 is an apocalyptic number.

26009979 is a deficient number, since it is larger than the sum of its proper divisors (8669997).

26009979 is an equidigital number, since it uses as much as digits as its factorization.

26009979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669996.

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

The square root of 26009979 is about 5099.9979411761. The cubic root of 26009979 is about 296.2875029522.

The spelling of 26009979 in words is "twenty-six million, nine thousand, nine hundred seventy-nine".