26980979 has 4 divisors (see below), whose sum is σ = 26992584. Its totient is φ = 26969376.

The previous prime is 26980963. The next prime is 26980981. The reversal of 26980979 is 97908962.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 26980979 - 2⁴ = 26980963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26980939) 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, 977 + ... + 7410.

It is an arithmetic number, because the mean of its divisors is an integer number (6748146).

Almost surely, 2^26980979 is an apocalyptic number.

26980979 is a deficient number, since it is larger than the sum of its proper divisors (11605).

26980979 is an equidigital number, since it uses as much as digits as its factorization.

26980979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11604.

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 26980979 is about 5194.3218036621. The cubic root of 26980979 is about 299.9295353022.

The spelling of 26980979 in words is "twenty-six million, nine hundred eighty thousand, nine hundred seventy-nine".