27138904939 has 4 divisors (see below), whose sum is σ = 27139933224. Its totient is φ = 27137876656.

The previous prime is 27138904937. The next prime is 27138904943. The reversal of 27138904939 is 93940983172.

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 27138904939 - 2¹ = 27138904937 is a prime.

It is a super-2 number, since 2×27138904939² (a number of 22 digits) contains 22 as substring.

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 27138904939.

It is not an unprimeable number, because it can be changed into a prime (27138904937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473482 + ... + 527695.

It is an arithmetic number, because the mean of its divisors is an integer number (6784983306).

Almost surely, 2^27138904939 is an apocalyptic number.

27138904939 is a deficient number, since it is larger than the sum of its proper divisors (1028285).

27138904939 is a wasteful number, since it uses less digits than its factorization.

27138904939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028284.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 27138904939 in words is "twenty-seven billion, one hundred thirty-eight million, nine hundred four thousand, nine hundred thirty-nine".