27427691 has 2 divisors, whose sum is σ = 27427692. Its totient is φ = 27427690.

The previous prime is 27427669. The next prime is 27427717. The reversal of 27427691 is 19672472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27427691 - 2⁶ = 27427627 is a prime.

It is not a weakly prime, because it can be changed into another prime (27427651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13713845 + 13713846.

It is an arithmetic number, because the mean of its divisors is an integer number (13713846).

Almost surely, 2^27427691 is an apocalyptic number.

27427691 is a deficient number, since it is larger than the sum of its proper divisors (1).

27427691 is an equidigital number, since it uses as much as digits as its factorization.

27427691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 27427691 is about 5237.1453101857. The cubic root of 27427691 is about 301.5757496268.

The spelling of 27427691 in words is "twenty-seven million, four hundred twenty-seven thousand, six hundred ninety-one".