27109961 has 2 divisors, whose sum is σ = 27109962. Its totient is φ = 27109960.

The previous prime is 27109949. The next prime is 27109981. The reversal of 27109961 is 16990172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26584336 + 525625 = 5156^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 27109961 - 2²² = 22915657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27109921) 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, 13554980 + 13554981.

It is an arithmetic number, because the mean of its divisors is an integer number (13554981).

Almost surely, 2^27109961 is an apocalyptic number.

It is an amenable number.

27109961 is a deficient number, since it is larger than the sum of its proper divisors (1).

27109961 is an equidigital number, since it uses as much as digits as its factorization.

27109961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 27109961 is about 5206.7226736211. The cubic root of 27109961 is about 300.4067113334.

The spelling of 27109961 in words is "twenty-seven million, one hundred nine thousand, nine hundred sixty-one".