27721069 has 2 divisors, whose sum is σ = 27721070. Its totient is φ = 27721068.

The previous prime is 27721063. The next prime is 27721073. The reversal of 27721069 is 96012772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 315844 = 5235^2 + 562^2 .

It is a cyclic number.

It is not a de Polignac number, because 27721069 - 2³ = 27721061 is a prime.

It is a super-2 number, since 2×27721069² = 1536915333005522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27721061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13860534 + 13860535.

It is an arithmetic number, because the mean of its divisors is an integer number (13860535).

Almost surely, 2^27721069 is an apocalyptic number.

It is an amenable number.

27721069 is a deficient number, since it is larger than the sum of its proper divisors (1).

27721069 is an equidigital number, since it uses as much as digits as its factorization.

27721069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 27721069 is about 5265.0801513367. The cubic root of 27721069 is about 302.6471983560.

The spelling of 27721069 in words is "twenty-seven million, seven hundred twenty-one thousand, sixty-nine".