27367721 has 2 divisors, whose sum is σ = 27367722. Its totient is φ = 27367720.

The previous prime is 27367649. The next prime is 27367729. The reversal of 27367721 is 12776372.

27367721 is nontrivially palindromic in base 4.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19044496 + 8323225 = 4364^2 + 2885^2 .

It is a cyclic number.

It is not a de Polignac number, because 27367721 - 2²² = 23173417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27367729) 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, 13683860 + 13683861.

It is an arithmetic number, because the mean of its divisors is an integer number (13683861).

Almost surely, 2^27367721 is an apocalyptic number.

It is an amenable number.

27367721 is a deficient number, since it is larger than the sum of its proper divisors (1).

27367721 is an equidigital number, since it uses as much as digits as its factorization.

27367721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 35.

The square root of 27367721 is about 5231.4167297205. The cubic root of 27367721 is about 301.3557931491.

The spelling of 27367721 in words is "twenty-seven million, three hundred sixty-seven thousand, seven hundred twenty-one".