27661727 has 2 divisors, whose sum is σ = 27661728. Its totient is φ = 27661726.

The previous prime is 27661723. The next prime is 27661729. The reversal of 27661727 is 72716672.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27661727 - 2² = 27661723 is a prime.

It is a super-2 number, since 2×27661727² = 1530342281245058, which contains 22 as substring.

Together with 27661729, 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 (27661721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13830863 + 13830864.

It is an arithmetic number, because the mean of its divisors is an integer number (13830864).

Almost surely, 2^27661727 is an apocalyptic number.

27661727 is a deficient number, since it is larger than the sum of its proper divisors (1).

27661727 is an equidigital number, since it uses as much as digits as its factorization.

27661727 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 38.

The square root of 27661727 is about 5259.4417004089. The cubic root of 27661727 is about 302.4310869134.

The spelling of 27661727 in words is "twenty-seven million, six hundred sixty-one thousand, seven hundred twenty-seven".