27173129 has 2 divisors, whose sum is σ = 27173130. Its totient is φ = 27173128.

The previous prime is 27173117. The next prime is 27173131. The reversal of 27173129 is 92137172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18292729 + 8880400 = 4277^2 + 2980^2 .

It is a cyclic number.

It is not a de Polignac number, because 27173129 - 2¹² = 27169033 is a prime.

Together with 27173131, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27173095 and 27173104.

It is not a weakly prime, because it can be changed into another prime (27173149) 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 as a sum of consecutive naturals, namely, 13586564 + 13586565.

It is an arithmetic number, because the mean of its divisors is an integer number (13586565).

Almost surely, 2^27173129 is an apocalyptic number.

It is an amenable number.

27173129 is a deficient number, since it is larger than the sum of its proper divisors (1).

27173129 is an equidigital number, since it uses as much as digits as its factorization.

27173129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 27173129 is about 5212.7851480758. The cubic root of 27173129 is about 300.6398528427.

The spelling of 27173129 in words is "twenty-seven million, one hundred seventy-three thousand, one hundred twenty-nine".