27439859 has 2 divisors, whose sum is σ = 27439860. Its totient is φ = 27439858.

The previous prime is 27439843. The next prime is 27439961. The reversal of 27439859 is 95893472.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27439859 - 2⁴ = 27439843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27439259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13719929 + 13719930.

It is an arithmetic number, because the mean of its divisors is an integer number (13719930).

Almost surely, 2^27439859 is an apocalyptic number.

27439859 is a deficient number, since it is larger than the sum of its proper divisors (1).

27439859 is an equidigital number, since it uses as much as digits as its factorization.

27439859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 27439859 is about 5238.3068829537. The cubic root of 27439859 is about 301.6203399789.

The spelling of 27439859 in words is "twenty-seven million, four hundred thirty-nine thousand, eight hundred fifty-nine".