27279641 has 2 divisors, whose sum is σ = 27279642. Its totient is φ = 27279640.

The previous prime is 27279631. The next prime is 27279643. The reversal of 27279641 is 14697272.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27081616 + 198025 = 5204^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 27279641 - 2¹⁰ = 27278617 is a prime.

It is a Sophie Germain prime.

Together with 27279643, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 27279595 and 27279604.

It is not a weakly prime, because it can be changed into another prime (27279643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13639820 + 13639821.

It is an arithmetic number, because the mean of its divisors is an integer number (13639821).

Almost surely, 2^27279641 is an apocalyptic number.

It is an amenable number.

27279641 is a deficient number, since it is larger than the sum of its proper divisors (1).

27279641 is an equidigital number, since it uses as much as digits as its factorization.

27279641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 38.

The square root of 27279641 is about 5222.9915757160. The cubic root of 27279641 is about 301.0321522076.

The spelling of 27279641 in words is "twenty-seven million, two hundred seventy-nine thousand, six hundred forty-one".