27506881 has 2 divisors, whose sum is σ = 27506882. Its totient is φ = 27506880.

The previous prime is 27506879. The next prime is 27506887. The reversal of 27506881 is 18860572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20793600 + 6713281 = 4560^2 + 2591^2 .

It is a cyclic number.

It is not a de Polignac number, because 27506881 - 2¹ = 27506879 is a prime.

It is a super-2 number, since 2×27506881² = 1513257004696322, which contains 22 as substring.

Together with 27506879, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27506881.

It is not a weakly prime, because it can be changed into another prime (27506887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13753440 + 13753441.

It is an arithmetic number, because the mean of its divisors is an integer number (13753441).

Almost surely, 2^27506881 is an apocalyptic number.

It is an amenable number.

27506881 is a deficient number, since it is larger than the sum of its proper divisors (1).

27506881 is an equidigital number, since it uses as much as digits as its factorization.

27506881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 27506881 is about 5244.7002774229. The cubic root of 27506881 is about 301.8657100705.

The spelling of 27506881 in words is "twenty-seven million, five hundred six thousand, eight hundred eighty-one".