27530989 has 2 divisors, whose sum is σ = 27530990. Its totient is φ = 27530988.

The previous prime is 27530983. The next prime is 27530999. The reversal of 27530989 is 98903572.

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., 16362025 + 11168964 = 4045^2 + 3342^2 .

It is a cyclic number.

It is not a de Polignac number, because 27530989 - 2¹³ = 27522797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27530983) 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, 13765494 + 13765495.

It is an arithmetic number, because the mean of its divisors is an integer number (13765495).

Almost surely, 2^27530989 is an apocalyptic number.

It is an amenable number.

27530989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27530989 is an equidigital number, since it uses as much as digits as its factorization.

27530989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 27530989 is about 5246.9980941487. The cubic root of 27530989 is about 301.9538729017.

The spelling of 27530989 in words is "twenty-seven million, five hundred thirty thousand, nine hundred eighty-nine".