27327721 has 4 divisors (see below), whose sum is σ = 28935252. Its totient is φ = 25720192.

The previous prime is 27327683. The next prime is 27327731. The reversal of 27327721 is 12772372.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13039321 + 14288400 = 3611^2 + 3780^2 .

It is a cyclic number.

It is not a de Polignac number, because 27327721 - 2⁷ = 27327593 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27327731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803740 + ... + 803773.

It is an arithmetic number, because the mean of its divisors is an integer number (7233813).

Almost surely, 2^27327721 is an apocalyptic number.

It is an amenable number.

27327721 is a deficient number, since it is larger than the sum of its proper divisors (1607531).

27327721 is a wasteful number, since it uses less digits than its factorization.

27327721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607530.

The product of its digits is 8232, while the sum is 31.

The square root of 27327721 is about 5227.5922756083. The cubic root of 27327721 is about 301.2089034462.

The spelling of 27327721 in words is "twenty-seven million, three hundred twenty-seven thousand, seven hundred twenty-one".