27448643 has 2 divisors, whose sum is σ = 27448644. Its totient is φ = 27448642.

The previous prime is 27448633. The next prime is 27448661. The reversal of 27448643 is 34684472.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27448643 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 27448597 and 27448606.

It is not a weakly prime, because it can be changed into another prime (27448633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13724321 + 13724322.

It is an arithmetic number, because the mean of its divisors is an integer number (13724322).

Almost surely, 2^27448643 is an apocalyptic number.

27448643 is a deficient number, since it is larger than the sum of its proper divisors (1).

27448643 is an equidigital number, since it uses as much as digits as its factorization.

27448643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 38.

The square root of 27448643 is about 5239.1452547147. The cubic root of 27448643 is about 301.6525212717.

The spelling of 27448643 in words is "twenty-seven million, four hundred forty-eight thousand, six hundred forty-three".