27555629 has 2 divisors, whose sum is σ = 27555630. Its totient is φ = 27555628.

The previous prime is 27555607. The next prime is 27555631. The reversal of 27555629 is 92655572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26030404 + 1525225 = 5102^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 27555629 - 2¹² = 27551533 is a prime.

Together with 27555631, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27555329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13777814 + 13777815.

It is an arithmetic number, because the mean of its divisors is an integer number (13777815).

Almost surely, 2^27555629 is an apocalyptic number.

It is an amenable number.

27555629 is a deficient number, since it is larger than the sum of its proper divisors (1).

27555629 is an equidigital number, since it uses as much as digits as its factorization.

27555629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 189000, while the sum is 41.

The square root of 27555629 is about 5249.3455782602. The cubic root of 27555629 is about 302.0439280866.

The spelling of 27555629 in words is "twenty-seven million, five hundred fifty-five thousand, six hundred twenty-nine".