27139731329 has 2 divisors, whose sum is σ = 27139731330. Its totient is φ = 27139731328.

The previous prime is 27139731323. The next prime is 27139731389. The reversal of 27139731329 is 92313793172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22891690000 + 4248041329 = 151300^2 + 65177^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27139731329 is a prime.

It is a super-2 number, since 2×27139731329² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (27139731323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13569865664 + 13569865665.

It is an arithmetic number, because the mean of its divisors is an integer number (13569865665).

Almost surely, 2^27139731329 is an apocalyptic number.

It is an amenable number.

27139731329 is a deficient number, since it is larger than the sum of its proper divisors (1).

27139731329 is an equidigital number, since it uses as much as digits as its factorization.

27139731329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 47.

The spelling of 27139731329 in words is "twenty-seven billion, one hundred thirty-nine million, seven hundred thirty-one thousand, three hundred twenty-nine".