26979679 has 4 divisors (see below), whose sum is σ = 27128920. Its totient is φ = 26830440.

The previous prime is 26979671. The next prime is 26979683. The reversal of 26979679 is 97697962.

26979679 = T₂ + T₃ + ... + T₅₄₄.

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 26979679 - 2³ = 26979671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26979671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74349 + ... + 74710.

It is an arithmetic number, because the mean of its divisors is an integer number (6782230).

Almost surely, 2^26979679 is an apocalyptic number.

26979679 is a deficient number, since it is larger than the sum of its proper divisors (149241).

26979679 is a wasteful number, since it uses less digits than its factorization.

26979679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149240.

The product of its digits is 2571912, while the sum is 55.

The square root of 26979679 is about 5194.1966655105. The cubic root of 26979679 is about 299.9247181474.

The spelling of 26979679 in words is "twenty-six million, nine hundred seventy-nine thousand, six hundred seventy-nine".