27871457 has 2 divisors, whose sum is σ = 27871458. Its totient is φ = 27871456.

The previous prime is 27871451. The next prime is 27871549. The reversal of 27871457 is 75417872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17106496 + 10764961 = 4136^2 + 3281^2 .

It is a cyclic number.

It is not a de Polignac number, because 27871457 - 2¹⁴ = 27855073 is a prime.

It is not a weakly prime, because it can be changed into another prime (27871451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13935728 + 13935729.

It is an arithmetic number, because the mean of its divisors is an integer number (13935729).

Almost surely, 2^27871457 is an apocalyptic number.

It is an amenable number.

27871457 is a deficient number, since it is larger than the sum of its proper divisors (1).

27871457 is an equidigital number, since it uses as much as digits as its factorization.

27871457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109760, while the sum is 41.

The square root of 27871457 is about 5279.3424779986. The cubic root of 27871457 is about 303.1935030214.

The spelling of 27871457 in words is "twenty-seven million, eight hundred seventy-one thousand, four hundred fifty-seven".