135288993 has 16 divisors (see below), whose sum is σ = 207299456. Its totient is φ = 76878720.

The previous prime is 135288961. The next prime is 135288997. The reversal of 135288993 is 399882531.

It is a happy number.

It is not a de Polignac number, because 135288993 - 2⁵ = 135288961 is a prime.

It is a super-2 number, since 2×135288993² = 36606223253908098, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135288997) 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, 13996 + ... + 21597.

It is an arithmetic number, because the mean of its divisors is an integer number (12956216).

Almost surely, 2^135288993 is an apocalyptic number.

It is an amenable number.

135288993 is a deficient number, since it is larger than the sum of its proper divisors (72010463).

135288993 is a wasteful number, since it uses less digits than its factorization.

135288993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35784.

The product of its digits is 466560, while the sum is 48.

The square root of 135288993 is about 11631.3796688097. The cubic root of 135288993 is about 513.3585757625.

The spelling of 135288993 in words is "one hundred thirty-five million, two hundred eighty-eight thousand, nine hundred ninety-three".