27009421 has 2 divisors, whose sum is σ = 27009422. Its totient is φ = 27009420.

The previous prime is 27009407. The next prime is 27009457. The reversal of 27009421 is 12490072.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21031396 + 5978025 = 4586^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 27009421 - 2⁷ = 27009293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27009491) 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, 13504710 + 13504711.

It is an arithmetic number, because the mean of its divisors is an integer number (13504711).

Almost surely, 2^27009421 is an apocalyptic number.

It is an amenable number.

27009421 is a deficient number, since it is larger than the sum of its proper divisors (1).

27009421 is an equidigital number, since it uses as much as digits as its factorization.

27009421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 27009421 is about 5197.0588797896. The cubic root of 27009421 is about 300.0348885351.

Adding to 27009421 its reverse (12490072), we get a palindrome (39499493).

It can be divided in two parts, 2700 and 9421, that added together give a palindrome (12121).

The spelling of 27009421 in words is "twenty-seven million, nine thousand, four hundred twenty-one".