27012979 has 4 divisors (see below), whose sum is σ = 30871984. Its totient is φ = 23153976.

The previous prime is 27012959. The next prime is 27013031. The reversal of 27012979 is 97921072.

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 27012979 - 2¹¹ = 27010931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27012919) 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, 1929492 + ... + 1929505.

It is an arithmetic number, because the mean of its divisors is an integer number (7717996).

Almost surely, 2^27012979 is an apocalyptic number.

27012979 is a deficient number, since it is larger than the sum of its proper divisors (3859005).

27012979 is an equidigital number, since it uses as much as digits as its factorization.

27012979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3859004.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 27012979 is about 5197.4011775117. The cubic root of 27012979 is about 300.0480626699.

The spelling of 27012979 in words is "twenty-seven million, twelve thousand, nine hundred seventy-nine".