27441991 has 2 divisors, whose sum is σ = 27441992. Its totient is φ = 27441990.

The previous prime is 27441989. The next prime is 27442001. The reversal of 27441991 is 19914472.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27441991 - 2¹ = 27441989 is a prime.

Together with 27441989, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 27441991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27441971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13720995 + 13720996.

It is an arithmetic number, because the mean of its divisors is an integer number (13720996).

Almost surely, 2^27441991 is an apocalyptic number.

27441991 is a deficient number, since it is larger than the sum of its proper divisors (1).

27441991 is an equidigital number, since it uses as much as digits as its factorization.

27441991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 27441991 is about 5238.5103798695. The cubic root of 27441991 is about 301.6281514611.

The spelling of 27441991 in words is "twenty-seven million, four hundred forty-one thousand, nine hundred ninety-one".