27009881 has 2 divisors, whose sum is σ = 27009882. Its totient is φ = 27009880.

The previous prime is 27009869. The next prime is 27009893. The reversal of 27009881 is 18890072.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (27009869) and next prime (27009893).

It can be written as a sum of positive squares in only one way, i.e., 21529600 + 5480281 = 4640^2 + 2341^2 .

It is a cyclic number.

It is not a de Polignac number, because 27009881 - 2¹⁸ = 26747737 is a prime.

It is a super-2 number, since 2×27009881² = 1459067343268322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27009841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13504940 + 13504941.

It is an arithmetic number, because the mean of its divisors is an integer number (13504941).

Almost surely, 2^27009881 is an apocalyptic number.

It is an amenable number.

27009881 is a deficient number, since it is larger than the sum of its proper divisors (1).

27009881 is an equidigital number, since it uses as much as digits as its factorization.

27009881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 27009881 is about 5197.1031354015. The cubic root of 27009881 is about 300.0365918329.

The spelling of 27009881 in words is "twenty-seven million, nine thousand, eight hundred eighty-one".