27293989 has 2 divisors, whose sum is σ = 27293990. Its totient is φ = 27293988.

The previous prime is 27293983. The next prime is 27293999. The reversal of 27293989 is 98939272.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19509889 + 7784100 = 4417^2 + 2790^2 .

It is a cyclic number.

It is not a de Polignac number, because 27293989 - 2¹¹ = 27291941 is a prime.

It is a super-3 number, since 3×27293989³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27293983) 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, 13646994 + 13646995.

It is an arithmetic number, because the mean of its divisors is an integer number (13646995).

Almost surely, 2^27293989 is an apocalyptic number.

It is an amenable number.

27293989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27293989 is an equidigital number, since it uses as much as digits as its factorization.

27293989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 27293989 is about 5224.3649374828. The cubic root of 27293989 is about 301.0849199144.

It can be divided in two parts, 27293 and 989, that added together give a palindrome (28282).

The spelling of 27293989 in words is "twenty-seven million, two hundred ninety-three thousand, nine hundred eighty-nine".