27661037 has 2 divisors, whose sum is σ = 27661038. Its totient is φ = 27661036.

The previous prime is 27661033. The next prime is 27661063. The reversal of 27661037 is 73016672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14600041 + 13060996 = 3821^2 + 3614^2 .

It is a cyclic number.

It is not a de Polignac number, because 27661037 - 2² = 27661033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27660994 and 27661012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27661031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13830518 + 13830519.

It is an arithmetic number, because the mean of its divisors is an integer number (13830519).

Almost surely, 2^27661037 is an apocalyptic number.

It is an amenable number.

27661037 is a deficient number, since it is larger than the sum of its proper divisors (1).

27661037 is an equidigital number, since it uses as much as digits as its factorization.

27661037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 27661037 is about 5259.3761036838. The cubic root of 27661037 is about 302.4285722573.

The spelling of 27661037 in words is "twenty-seven million, six hundred sixty-one thousand, thirty-seven".