135188989 has 16 divisors (see below), whose sum is σ = 148176000. Its totient is φ = 122590656.

The previous prime is 135188983. The next prime is 135189007. The reversal of 135188989 is 989881531.

It is a cyclic number.

It is not a de Polignac number, because 135188989 - 2¹³ = 135180797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135188983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376392 + ... + 376750.

It is an arithmetic number, because the mean of its divisors is an integer number (9261000).

Almost surely, 2^135188989 is an apocalyptic number.

It is an amenable number.

135188989 is a deficient number, since it is larger than the sum of its proper divisors (12987011).

135188989 is a wasteful number, since it uses less digits than its factorization.

135188989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804.

The product of its digits is 622080, while the sum is 52.

The square root of 135188989 is about 11627.0799859638. The cubic root of 135188989 is about 513.2320550838.

The spelling of 135188989 in words is "one hundred thirty-five million, one hundred eighty-eight thousand, nine hundred eighty-nine".