135540289 has 4 divisors (see below), whose sum is σ = 135723456. Its totient is φ = 135357124.

The previous prime is 135540203. The next prime is 135540299. The reversal of 135540289 is 982045531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 982045531 = 29 ⋅33863639.

It is a cyclic number.

It is not a de Polignac number, because 135540289 - 2⁹ = 135539777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135540299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90469 + ... + 91954.

It is an arithmetic number, because the mean of its divisors is an integer number (33930864).

Almost surely, 2^135540289 is an apocalyptic number.

It is an amenable number.

135540289 is a deficient number, since it is larger than the sum of its proper divisors (183167).

135540289 is an equidigital number, since it uses as much as digits as its factorization.

135540289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183166.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 135540289 is about 11642.1771589338. The cubic root of 135540289 is about 513.6762295041.

The spelling of 135540289 in words is "one hundred thirty-five million, five hundred forty thousand, two hundred eighty-nine".