27336721 has 2 divisors, whose sum is σ = 27336722. Its totient is φ = 27336720.

The previous prime is 27336689. The next prime is 27336733. The reversal of 27336721 is 12763372.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19713600 + 7623121 = 4440^2 + 2761^2 .

It is a cyclic number.

It is not a de Polignac number, because 27336721 - 2⁵ = 27336689 is a prime.

It is not a weakly prime, because it can be changed into another prime (27336781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13668360 + 13668361.

It is an arithmetic number, because the mean of its divisors is an integer number (13668361).

Almost surely, 2^27336721 is an apocalyptic number.

It is an amenable number.

27336721 is a deficient number, since it is larger than the sum of its proper divisors (1).

27336721 is an equidigital number, since it uses as much as digits as its factorization.

27336721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 31.

The square root of 27336721 is about 5228.4530216882. The cubic root of 27336721 is about 301.2419661201.

The spelling of 27336721 in words is "twenty-seven million, three hundred thirty-six thousand, seven hundred twenty-one".