27384991 has 2 divisors, whose sum is σ = 27384992. Its totient is φ = 27384990.

The previous prime is 27384989. The next prime is 27385003. The reversal of 27384991 is 19948372.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27384991 - 2¹ = 27384989 is a prime.

Together with 27384989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27384901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13692495 + 13692496.

It is an arithmetic number, because the mean of its divisors is an integer number (13692496).

Almost surely, 2^27384991 is an apocalyptic number.

27384991 is a deficient number, since it is larger than the sum of its proper divisors (1).

27384991 is an equidigital number, since it uses as much as digits as its factorization.

27384991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 27384991 is about 5233.0670739061. The cubic root of 27384991 is about 301.4191685419.

It can be divided in two parts, 273 and 84991, that added together give a square (85264 = 292²).

The spelling of 27384991 in words is "twenty-seven million, three hundred eighty-four thousand, nine hundred ninety-one".