26979539 has 2 divisors, whose sum is σ = 26979540. Its totient is φ = 26979538.

The previous prime is 26979521. The next prime is 26979569. The reversal of 26979539 is 93597962.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26979539 - 2⁸ = 26979283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (26979509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13489769 + 13489770.

It is an arithmetic number, because the mean of its divisors is an integer number (13489770).

Almost surely, 2^26979539 is an apocalyptic number.

26979539 is a deficient number, since it is larger than the sum of its proper divisors (1).

26979539 is an equidigital number, since it uses as much as digits as its factorization.

26979539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 918540, while the sum is 50.

The square root of 26979539 is about 5194.1831889143. The cubic root of 26979539 is about 299.9241993677.

It can be divided in two parts, 2697953 and 9, that added together give a palindrome (2697962).

The spelling of 26979539 in words is "twenty-six million, nine hundred seventy-nine thousand, five hundred thirty-nine".