27404939 has 2 divisors, whose sum is σ = 27404940. Its totient is φ = 27404938.

The previous prime is 27404929. The next prime is 27404941. The reversal of 27404939 is 93940472.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27404939 is a prime.

Together with 27404941, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27404929) 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, 13702469 + 13702470.

It is an arithmetic number, because the mean of its divisors is an integer number (13702470).

Almost surely, 2^27404939 is an apocalyptic number.

27404939 is a deficient number, since it is larger than the sum of its proper divisors (1).

27404939 is an equidigital number, since it uses as much as digits as its factorization.

27404939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 27404939 is about 5234.9726837874. The cubic root of 27404939 is about 301.4923381871.

The spelling of 27404939 in words is "twenty-seven million, four hundred four thousand, nine hundred thirty-nine".