27135389 has 2 divisors, whose sum is σ = 27135390. Its totient is φ = 27135388.

The previous prime is 27135373. The next prime is 27135397. The reversal of 27135389 is 98353172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21996100 + 5139289 = 4690^2 + 2267^2 .

It is a cyclic number.

It is not a de Polignac number, because 27135389 - 2⁴ = 27135373 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27135989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13567694 + 13567695.

It is an arithmetic number, because the mean of its divisors is an integer number (13567695).

Almost surely, 2^27135389 is an apocalyptic number.

It is an amenable number.

27135389 is a deficient number, since it is larger than the sum of its proper divisors (1).

27135389 is an equidigital number, since it uses as much as digits as its factorization.

27135389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 27135389 is about 5209.1639444348. The cubic root of 27135389 is about 300.5006049251.

The spelling of 27135389 in words is "twenty-seven million, one hundred thirty-five thousand, three hundred eighty-nine".