27897143 has 2 divisors, whose sum is σ = 27897144. Its totient is φ = 27897142.

The previous prime is 27897131. The next prime is 27897151. The reversal of 27897143 is 34179872.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27897143 - 2¹⁰ = 27896119 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27897143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27897193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13948571 + 13948572.

It is an arithmetic number, because the mean of its divisors is an integer number (13948572).

Almost surely, 2^27897143 is an apocalyptic number.

27897143 is a deficient number, since it is larger than the sum of its proper divisors (1).

27897143 is an equidigital number, since it uses as much as digits as its factorization.

27897143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 27897143 is about 5281.7746070805. The cubic root of 27897143 is about 303.2866142541.

The spelling of 27897143 in words is "twenty-seven million, eight hundred ninety-seven thousand, one hundred forty-three".