27868439 has 2 divisors, whose sum is σ = 27868440. Its totient is φ = 27868438.

The previous prime is 27868427. The next prime is 27868441. The reversal of 27868439 is 93486872.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27868439 is a prime.

Together with 27868441, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27868393 and 27868402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27868339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13934219 + 13934220.

It is an arithmetic number, because the mean of its divisors is an integer number (13934220).

Almost surely, 2^27868439 is an apocalyptic number.

27868439 is a deficient number, since it is larger than the sum of its proper divisors (1).

27868439 is an equidigital number, since it uses as much as digits as its factorization.

27868439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 27868439 is about 5279.0566392112. The cubic root of 27868439 is about 303.1825590771.

The spelling of 27868439 in words is "twenty-seven million, eight hundred sixty-eight thousand, four hundred thirty-nine".