27404081 has 2 divisors, whose sum is σ = 27404082. Its totient is φ = 27404080.

The previous prime is 27404071. The next prime is 27404129. The reversal of 27404081 is 18040472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27133681 + 270400 = 5209^2 + 520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27404081 is a prime.

It is a super-2 number, since 2×27404081² = 1501967310909122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27404081.

It is not a weakly prime, because it can be changed into another prime (27404011) 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, 13702040 + 13702041.

It is an arithmetic number, because the mean of its divisors is an integer number (13702041).

Almost surely, 2^27404081 is an apocalyptic number.

It is an amenable number.

27404081 is a deficient number, since it is larger than the sum of its proper divisors (1).

27404081 is an equidigital number, since it uses as much as digits as its factorization.

27404081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 27404081 is about 5234.8907342943. The cubic root of 27404081 is about 301.4891917576.

The spelling of 27404081 in words is "twenty-seven million, four hundred four thousand, eighty-one".