27627661 has 2 divisors, whose sum is σ = 27627662. Its totient is φ = 27627660.

The previous prime is 27627631. The next prime is 27627667. The reversal of 27627661 is 16672672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17065161 + 10562500 = 4131^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 27627661 - 2¹⁷ = 27496589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27627661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27627667) 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, 13813830 + 13813831.

It is an arithmetic number, because the mean of its divisors is an integer number (13813831).

Almost surely, 2^27627661 is an apocalyptic number.

It is an amenable number.

27627661 is a deficient number, since it is larger than the sum of its proper divisors (1).

27627661 is an equidigital number, since it uses as much as digits as its factorization.

27627661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 27627661 is about 5256.2021460366. The cubic root of 27627661 is about 302.3068858274.

The spelling of 27627661 in words is "twenty-seven million, six hundred twenty-seven thousand, six hundred sixty-one".