27993877 has 2 divisors, whose sum is σ = 27993878. Its totient is φ = 27993876.

The previous prime is 27993869. The next prime is 27993913. The reversal of 27993877 is 77839972.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21613201 + 6380676 = 4649^2 + 2526^2 .

It is a cyclic number.

It is not a de Polignac number, because 27993877 - 2³ = 27993869 is a prime.

It is a super-2 number, since 2×27993877² = 1567314298982258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27993677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13996938 + 13996939.

It is an arithmetic number, because the mean of its divisors is an integer number (13996939).

Almost surely, 2^27993877 is an apocalyptic number.

It is an amenable number.

27993877 is a deficient number, since it is larger than the sum of its proper divisors (1).

27993877 is an equidigital number, since it uses as much as digits as its factorization.

27993877 is an odious number, because the sum of its binary digits is odd.

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

The square root of 27993877 is about 5290.9240213785. The cubic root of 27993877 is about 303.6367610093.

The spelling of 27993877 in words is "twenty-seven million, nine hundred ninety-three thousand, eight hundred seventy-seven".