135193989 has 24 divisors (see below), whose sum is σ = 211748160. Its totient is φ = 76495104.

The previous prime is 135193909. The next prime is 135193997. The reversal of 135193989 is 989391531.

It is not a de Polignac number, because 135193989 - 2⁸ = 135193733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135193909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10677 + ... + 19605.

It is an arithmetic number, because the mean of its divisors is an integer number (8822840).

Almost surely, 2^135193989 is an apocalyptic number.

It is an amenable number.

135193989 is a deficient number, since it is larger than the sum of its proper divisors (76554171).

135193989 is a wasteful number, since it uses less digits than its factorization.

135193989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9049 (or 9042 counting only the distinct ones).

The product of its digits is 262440, while the sum is 48.

The square root of 135193989 is about 11627.2949992679. The cubic root of 135193989 is about 513.2383823462.

The spelling of 135193989 in words is "one hundred thirty-five million, one hundred ninety-three thousand, nine hundred eighty-nine".