27133621 has 2 divisors, whose sum is σ = 27133622. Its totient is φ = 27133620.

The previous prime is 27133609. The next prime is 27133661. The reversal of 27133621 is 12633172.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26471025 + 662596 = 5145^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 27133621 - 2⁹ = 27133109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27133661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13566810 + 13566811.

It is an arithmetic number, because the mean of its divisors is an integer number (13566811).

Almost surely, 2^27133621 is an apocalyptic number.

It is an amenable number.

27133621 is a deficient number, since it is larger than the sum of its proper divisors (1).

27133621 is an equidigital number, since it uses as much as digits as its factorization.

27133621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 25.

The square root of 27133621 is about 5208.9942407340. The cubic root of 27133621 is about 300.4940784342.

Adding to 27133621 its reverse (12633172), we get a palindrome (39766793).

The spelling of 27133621 in words is "twenty-seven million, one hundred thirty-three thousand, six hundred twenty-one".