27539389 has 2 divisors, whose sum is σ = 27539390. Its totient is φ = 27539388.

The previous prime is 27539387. The next prime is 27539399. The reversal of 27539389 is 98393572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 5963364 = 4645^2 + 2442^2 .

It is a cyclic number.

It is not a de Polignac number, because 27539389 - 2¹ = 27539387 is a prime.

Together with 27539387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27539381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13769694 + 13769695.

It is an arithmetic number, because the mean of its divisors is an integer number (13769695).

Almost surely, 2^27539389 is an apocalyptic number.

It is an amenable number.

27539389 is a deficient number, since it is larger than the sum of its proper divisors (1).

27539389 is an equidigital number, since it uses as much as digits as its factorization.

27539389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 46.

The square root of 27539389 is about 5247.7984907959. The cubic root of 27539389 is about 301.9845795673.

The spelling of 27539389 in words is "twenty-seven million, five hundred thirty-nine thousand, three hundred eighty-nine".