135284489 has 4 divisors (see below), whose sum is σ = 135647556. Its totient is φ = 134921424.

The previous prime is 135284473. The next prime is 135284491. The reversal of 135284489 is 984482531.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114854089 + 20430400 = 10717^2 + 4520^2 .

It is a cyclic number.

It is not a de Polignac number, because 135284489 - 2⁴ = 135284473 is a prime.

It is a super-2 number, since 2×135284489² = 36603785927982242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135284089) 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, 180974 + ... + 181719.

It is an arithmetic number, because the mean of its divisors is an integer number (33911889).

Almost surely, 2^135284489 is an apocalyptic number.

It is an amenable number.

135284489 is a deficient number, since it is larger than the sum of its proper divisors (363067).

135284489 is an equidigital number, since it uses as much as digits as its factorization.

135284489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363066.

The product of its digits is 276480, while the sum is 44.

The square root of 135284489 is about 11631.1860530214. The cubic root of 135284489 is about 513.3528788401.

The spelling of 135284489 in words is "one hundred thirty-five million, two hundred eighty-four thousand, four hundred eighty-nine".