27389993 has 2 divisors, whose sum is σ = 27389994. Its totient is φ = 27389992.

The previous prime is 27389969. The next prime is 27390023. The reversal of 27389993 is 39998372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24334489 + 3055504 = 4933^2 + 1748^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27389993 is a prime.

It is not a weakly prime, because it can be changed into another prime (27389093) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13694996 + 13694997.

It is an arithmetic number, because the mean of its divisors is an integer number (13694997).

Almost surely, 2^27389993 is an apocalyptic number.

It is an amenable number.

27389993 is a deficient number, since it is larger than the sum of its proper divisors (1).

27389993 is an equidigital number, since it uses as much as digits as its factorization.

27389993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 50.

The square root of 27389993 is about 5233.5449744891. The cubic root of 27389993 is about 301.4375193105.

It can be divided in two parts, 27389 and 993, that added together give a palindrome (28382).

The spelling of 27389993 in words is "twenty-seven million, three hundred eighty-nine thousand, nine hundred ninety-three".