27427669 has 2 divisors, whose sum is σ = 27427670. Its totient is φ = 27427668.

The previous prime is 27427667. The next prime is 27427691. The reversal of 27427669 is 96672472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 11122225 = 4038^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 27427669 - 2¹ = 27427667 is a prime.

It is a super-2 number, since 2×27427669² = 1504554053547122, which contains 22 as substring.

Together with 27427667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27427663) 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, 13713834 + 13713835.

It is an arithmetic number, because the mean of its divisors is an integer number (13713835).

Almost surely, 2^27427669 is an apocalyptic number.

It is an amenable number.

27427669 is a deficient number, since it is larger than the sum of its proper divisors (1).

27427669 is an equidigital number, since it uses as much as digits as its factorization.

27427669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 43.

The square root of 27427669 is about 5237.1432098044. The cubic root of 27427669 is about 301.5756689946.

The spelling of 27427669 in words is "twenty-seven million, four hundred twenty-seven thousand, six hundred sixty-nine".