27706206139 has 2 divisors, whose sum is σ = 27706206140. Its totient is φ = 27706206138.

The previous prime is 27706206137. The next prime is 27706206221. The reversal of 27706206139 is 93160260772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27706206139 - 2¹ = 27706206137 is a prime.

It is a super-2 number, since 2×27706206139² (a number of 22 digits) contains 22 as substring.

Together with 27706206137, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 27706206095 and 27706206104.

It is not a weakly prime, because it can be changed into another prime (27706206131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13853103069 + 13853103070.

It is an arithmetic number, because the mean of its divisors is an integer number (13853103070).

Almost surely, 2^27706206139 is an apocalyptic number.

27706206139 is a deficient number, since it is larger than the sum of its proper divisors (1).

27706206139 is an equidigital number, since it uses as much as digits as its factorization.

27706206139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The spelling of 27706206139 in words is "twenty-seven billion, seven hundred six million, two hundred six thousand, one hundred thirty-nine".