135885889 has 2 divisors, whose sum is σ = 135885890. Its totient is φ = 135885888.

The previous prime is 135885887. The next prime is 135885917. The reversal of 135885889 is 988588531.

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., 106812225 + 29073664 = 10335^2 + 5392^2 .

It is a cyclic number.

It is not a de Polignac number, because 135885889 - 2¹ = 135885887 is a prime.

Together with 135885887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135885887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67942944 + 67942945.

It is an arithmetic number, because the mean of its divisors is an integer number (67942945).

Almost surely, 2^135885889 is an apocalyptic number.

It is an amenable number.

135885889 is a deficient number, since it is larger than the sum of its proper divisors (1).

135885889 is an equidigital number, since it uses as much as digits as its factorization.

135885889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2764800, while the sum is 55.

The square root of 135885889 is about 11657.0102942393. The cubic root of 135885889 is about 514.1124487129.

The spelling of 135885889 in words is "one hundred thirty-five million, eight hundred eighty-five thousand, eight hundred eighty-nine".