27277993 has 2 divisors, whose sum is σ = 27277994. Its totient is φ = 27277992.

The previous prime is 27277981. The next prime is 27278003. The reversal of 27277993 is 39977272.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 5822569 = 4632^2 + 2413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27277993 is a prime.

It is not a weakly prime, because it can be changed into another prime (27277903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13638996 + 13638997.

It is an arithmetic number, because the mean of its divisors is an integer number (13638997).

Almost surely, 2^27277993 is an apocalyptic number.

It is an amenable number.

27277993 is a deficient number, since it is larger than the sum of its proper divisors (1).

27277993 is an equidigital number, since it uses as much as digits as its factorization.

27277993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 333396, while the sum is 46.

The square root of 27277993 is about 5222.8338093414. The cubic root of 27277993 is about 301.0260901657.

The spelling of 27277993 in words is "twenty-seven million, two hundred seventy-seven thousand, nine hundred ninety-three".