27933509 has 2 divisors, whose sum is σ = 27933510. Its totient is φ = 27933508.

The previous prime is 27933457. The next prime is 27933599. The reversal of 27933509 is 90533972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27269284 + 664225 = 5222^2 + 815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27933509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27933599) 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, 13966754 + 13966755.

It is an arithmetic number, because the mean of its divisors is an integer number (13966755).

Almost surely, 2^27933509 is an apocalyptic number.

It is an amenable number.

27933509 is a deficient number, since it is larger than the sum of its proper divisors (1).

27933509 is an equidigital number, since it uses as much as digits as its factorization.

27933509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51030, while the sum is 38.

The square root of 27933509 is about 5285.2160788373. The cubic root of 27933509 is about 303.4183425816.

The spelling of 27933509 in words is "twenty-seven million, nine hundred thirty-three thousand, five hundred nine".