27939013 has 4 divisors (see below), whose sum is σ = 27951948. Its totient is φ = 27926080.

The previous prime is 27938971. The next prime is 27939017. The reversal of 27939013 is 31093972.

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 14152644 + 13786369 = 3762^2 + 3713^2 .

It is a cyclic number.

It is not a de Polignac number, because 27939013 - 2²¹ = 25841861 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 27939013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27939017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2356 + ... + 7837.

It is an arithmetic number, because the mean of its divisors is an integer number (6987987).

Almost surely, 2^27939013 is an apocalyptic number.

It is an amenable number.

27939013 is a deficient number, since it is larger than the sum of its proper divisors (12935).

27939013 is a wasteful number, since it uses less digits than its factorization.

27939013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12934.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 27939013 is about 5285.7367509175. The cubic root of 27939013 is about 303.4382697222.

The spelling of 27939013 in words is "twenty-seven million, nine hundred thirty-nine thousand, thirteen".