27919849 has 2 divisors, whose sum is σ = 27919850. Its totient is φ = 27919848.

The previous prime is 27919847. The next prime is 27919877. The reversal of 27919849 is 94891972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19740249 + 8179600 = 4443^2 + 2860^2 .

It is a cyclic number.

It is not a de Polignac number, because 27919849 - 2¹ = 27919847 is a prime.

Together with 27919847, 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 (27919841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13959924 + 13959925.

It is an arithmetic number, because the mean of its divisors is an integer number (13959925).

Almost surely, 2^27919849 is an apocalyptic number.

It is an amenable number.

27919849 is a deficient number, since it is larger than the sum of its proper divisors (1).

27919849 is an equidigital number, since it uses as much as digits as its factorization.

27919849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 27919849 is about 5283.9236368441. The cubic root of 27919849 is about 303.3688754660.

The spelling of 27919849 in words is "twenty-seven million, nine hundred nineteen thousand, eight hundred forty-nine".