27135989 has 2 divisors, whose sum is σ = 27135990. Its totient is φ = 27135988.

The previous prime is 27135959. The next prime is 27136003. The reversal of 27135989 is 98953172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24671089 + 2464900 = 4967^2 + 1570^2 .

It is a cyclic number.

It is not a de Polignac number, because 27135989 - 2¹⁶ = 27070453 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27135919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13567994 + 13567995.

It is an arithmetic number, because the mean of its divisors is an integer number (13567995).

Almost surely, 2^27135989 is an apocalyptic number.

It is an amenable number.

27135989 is a deficient number, since it is larger than the sum of its proper divisors (1).

27135989 is an equidigital number, since it uses as much as digits as its factorization.

27135989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 44.

The square root of 27135989 is about 5209.2215349321. The cubic root of 27135989 is about 300.5028197332.

The spelling of 27135989 in words is "twenty-seven million, one hundred thirty-five thousand, nine hundred eighty-nine".