27642061 has 2 divisors, whose sum is σ = 27642062. Its totient is φ = 27642060.

The previous prime is 27642019. The next prime is 27642091. The reversal of 27642061 is 16024672.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16048036 + 11594025 = 4006^2 + 3405^2 .

It is a cyclic number.

It is not a de Polignac number, because 27642061 - 2¹³ = 27633869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27642001) 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, 13821030 + 13821031.

It is an arithmetic number, because the mean of its divisors is an integer number (13821031).

Almost surely, 2^27642061 is an apocalyptic number.

It is an amenable number.

27642061 is a deficient number, since it is larger than the sum of its proper divisors (1).

27642061 is an equidigital number, since it uses as much as digits as its factorization.

27642061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 27642061 is about 5257.5717779218. The cubic root of 27642061 is about 302.3593991769.

The spelling of 27642061 in words is "twenty-seven million, six hundred forty-two thousand, sixty-one".