27987937 has 2 divisors, whose sum is σ = 27987938. Its totient is φ = 27987936.

The previous prime is 27987913. The next prime is 27987961. The reversal of 27987937 is 73978972.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (27987913) and next prime (27987961).

It can be written as a sum of positive squares in only one way, i.e., 21013056 + 6974881 = 4584^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 27987937 - 2⁷ = 27987809 is a prime.

It is not a weakly prime, because it can be changed into another prime (27984937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13993968 + 13993969.

It is an arithmetic number, because the mean of its divisors is an integer number (13993969).

Almost surely, 2^27987937 is an apocalyptic number.

It is an amenable number.

27987937 is a deficient number, since it is larger than the sum of its proper divisors (1).

27987937 is an equidigital number, since it uses as much as digits as its factorization.

27987937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1333584, while the sum is 52.

The square root of 27987937 is about 5290.3626529757. The cubic root of 27987937 is about 303.6152833371.

The spelling of 27987937 in words is "twenty-seven million, nine hundred eighty-seven thousand, nine hundred thirty-seven".