27401009 has 2 divisors, whose sum is σ = 27401010. Its totient is φ = 27401008.

The previous prime is 27400973. The next prime is 27401041. The reversal of 27401009 is 90010472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 2650384 = 4975^2 + 1628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27401009 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27401089) 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, 13700504 + 13700505.

It is an arithmetic number, because the mean of its divisors is an integer number (13700505).

Almost surely, 2^27401009 is an apocalyptic number.

It is an amenable number.

27401009 is a deficient number, since it is larger than the sum of its proper divisors (1).

27401009 is an equidigital number, since it uses as much as digits as its factorization.

27401009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 27401009 is about 5234.5973102045. The cubic root of 27401009 is about 301.4779256812.

The spelling of 27401009 in words is "twenty-seven million, four hundred one thousand, nine".