27399171727 has 2 divisors, whose sum is σ = 27399171728. Its totient is φ = 27399171726.

The previous prime is 27399171713. The next prime is 27399171739. The reversal of 27399171727 is 72717199372.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27399171727 is a prime.

It is a super-2 number, since 2×27399171727² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27399171127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13699585863 + 13699585864.

It is an arithmetic number, because the mean of its divisors is an integer number (13699585864).

Almost surely, 2^27399171727 is an apocalyptic number.

27399171727 is a deficient number, since it is larger than the sum of its proper divisors (1).

27399171727 is an equidigital number, since it uses as much as digits as its factorization.

27399171727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2333772, while the sum is 55.

The spelling of 27399171727 in words is "twenty-seven billion, three hundred ninety-nine million, one hundred seventy-one thousand, seven hundred twenty-seven".