27939943 has 2 divisors, whose sum is σ = 27939944. Its totient is φ = 27939942.

The previous prime is 27939913. The next prime is 27939971. The reversal of 27939943 is 34993972.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27939943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27939893 and 27939902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27939913) 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, 13969971 + 13969972.

It is an arithmetic number, because the mean of its divisors is an integer number (13969972).

Almost surely, 2^27939943 is an apocalyptic number.

27939943 is a deficient number, since it is larger than the sum of its proper divisors (1).

27939943 is an equidigital number, since it uses as much as digits as its factorization.

27939943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 46.

The square root of 27939943 is about 5285.8247227845. The cubic root of 27939943 is about 303.4416365133.

It can be divided in two parts, 27939 and 943, that added together give a palindrome (28882).

The spelling of 27939943 in words is "twenty-seven million, nine hundred thirty-nine thousand, nine hundred forty-three".