27438251 has 2 divisors, whose sum is σ = 27438252. Its totient is φ = 27438250.

The previous prime is 27438239. The next prime is 27438311. The reversal of 27438251 is 15283472.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27438251 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27428251) 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 as a sum of consecutive naturals, namely, 13719125 + 13719126.

It is an arithmetic number, because the mean of its divisors is an integer number (13719126).

Almost surely, 2^27438251 is an apocalyptic number.

27438251 is a deficient number, since it is larger than the sum of its proper divisors (1).

27438251 is an equidigital number, since it uses as much as digits as its factorization.

27438251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 32.

The square root of 27438251 is about 5238.1533959975. The cubic root of 27438251 is about 301.6144481243.

The spelling of 27438251 in words is "twenty-seven million, four hundred thirty-eight thousand, two hundred fifty-one".