135505889 has 2 divisors, whose sum is σ = 135505890. Its totient is φ = 135505888.

The previous prime is 135505847. The next prime is 135505897. The reversal of 135505889 is 988505531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71233600 + 64272289 = 8440^2 + 8017^2 .

It is a cyclic number.

It is not a de Polignac number, because 135505889 - 2⁸ = 135505633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135505819) 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, 67752944 + 67752945.

It is an arithmetic number, because the mean of its divisors is an integer number (67752945).

Almost surely, 2^135505889 is an apocalyptic number.

It is an amenable number.

135505889 is a deficient number, since it is larger than the sum of its proper divisors (1).

135505889 is an equidigital number, since it uses as much as digits as its factorization.

135505889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 44.

The square root of 135505889 is about 11640.6996782839. The cubic root of 135505889 is about 513.6327689765.

The spelling of 135505889 in words is "one hundred thirty-five million, five hundred five thousand, eight hundred eighty-nine".