27934021 has 4 divisors (see below), whose sum is σ = 28461132. Its totient is φ = 27406912.

The previous prime is 27934013. The next prime is 27934033. The reversal of 27934021 is 12043972.

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 15760900 + 12173121 = 3970^2 + 3489^2 .

It is a cyclic number.

It is not a de Polignac number, because 27934021 - 2³ = 27934013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27934421) 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 in 3 ways as a sum of consecutive naturals, for example, 263476 + ... + 263581.

It is an arithmetic number, because the mean of its divisors is an integer number (7115283).

Almost surely, 2^27934021 is an apocalyptic number.

It is an amenable number.

27934021 is a deficient number, since it is larger than the sum of its proper divisors (527111).

27934021 is an equidigital number, since it uses as much as digits as its factorization.

27934021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527110.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 27934021 is about 5285.2645156132. The cubic root of 27934021 is about 303.4201963795.

Adding to 27934021 its reverse (12043972), we get a palindrome (39977993).

The spelling of 27934021 in words is "twenty-seven million, nine hundred thirty-four thousand, twenty-one".