27557129 has 2 divisors, whose sum is σ = 27557130. Its totient is φ = 27557128.

The previous prime is 27557099. The next prime is 27557137. The reversal of 27557129 is 92175572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27541504 + 15625 = 5248^2 + 125^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27557129 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27557092 and 27557101.

It is not a weakly prime, because it can be changed into another prime (27557329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13778564 + 13778565.

It is an arithmetic number, because the mean of its divisors is an integer number (13778565).

Almost surely, 2^27557129 is an apocalyptic number.

It is an amenable number.

27557129 is a deficient number, since it is larger than the sum of its proper divisors (1).

27557129 is an equidigital number, since it uses as much as digits as its factorization.

27557129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 38.

The square root of 27557129 is about 5249.4884512684. The cubic root of 27557129 is about 302.0494086083.

The spelling of 27557129 in words is "twenty-seven million, five hundred fifty-seven thousand, one hundred twenty-nine".