26979005 has 4 divisors (see below), whose sum is σ = 32374812. Its totient is φ = 21583200.

The previous prime is 26978981. The next prime is 26979061. The reversal of 26979005 is 50097962.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9897316 + 17081689 = 3146^2 + 4133^2 .

It is not a de Polignac number, because 26979005 - 2¹⁰ = 26977981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26979005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2697896 + ... + 2697905.

It is an arithmetic number, because the mean of its divisors is an integer number (8093703).

Almost surely, 2^26979005 is an apocalyptic number.

It is an amenable number.

26979005 is a deficient number, since it is larger than the sum of its proper divisors (5395807).

26979005 is an equidigital number, since it uses as much as digits as its factorization.

26979005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395806.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 26979005 is about 5194.1317850051. The cubic root of 26979005 is about 299.9222205770.

The spelling of 26979005 in words is "twenty-six million, nine hundred seventy-nine thousand, five".