27234821 has 2 divisors, whose sum is σ = 27234822. Its totient is φ = 27234820.

The previous prime is 27234803. The next prime is 27234839. The reversal of 27234821 is 12843272.

It is a balanced prime because it is at equal distance from previous prime (27234803) and next prime (27234839).

It can be written as a sum of positive squares in only one way, i.e., 23174596 + 4060225 = 4814^2 + 2015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27234821 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27234841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13617410 + 13617411.

It is an arithmetic number, because the mean of its divisors is an integer number (13617411).

Almost surely, 2^27234821 is an apocalyptic number.

It is an amenable number.

27234821 is a deficient number, since it is larger than the sum of its proper divisors (1).

27234821 is an equidigital number, since it uses as much as digits as its factorization.

27234821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 29.

The square root of 27234821 is about 5218.6991674171. The cubic root of 27234821 is about 300.8671982162.

The spelling of 27234821 in words is "twenty-seven million, two hundred thirty-four thousand, eight hundred twenty-one".