27940961 has 2 divisors, whose sum is σ = 27940962. Its totient is φ = 27940960.

The previous prime is 27940931. The next prime is 27940973. The reversal of 27940961 is 16904972.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27363361 + 577600 = 5231^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 27940961 - 2⁶ = 27940897 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27940901) 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, 13970480 + 13970481.

It is an arithmetic number, because the mean of its divisors is an integer number (13970481).

Almost surely, 2^27940961 is an apocalyptic number.

It is an amenable number.

27940961 is a deficient number, since it is larger than the sum of its proper divisors (1).

27940961 is an equidigital number, since it uses as much as digits as its factorization.

27940961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 27940961 is about 5285.9210171927. The cubic root of 27940961 is about 303.4453217968.

The spelling of 27940961 in words is "twenty-seven million, nine hundred forty thousand, nine hundred sixty-one".