135559873 has 4 divisors (see below), whose sum is σ = 137782228. Its totient is φ = 133337520.

The previous prime is 135559871. The next prime is 135559883. The reversal of 135559873 is 378955531.

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 44395569 + 91164304 = 6663^2 + 9548^2 .

It is a cyclic number.

It is not a de Polignac number, because 135559873 - 2¹ = 135559871 is a prime.

It is a super-3 number, since 3×135559873³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135559871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1111086 + ... + 1111207.

It is an arithmetic number, because the mean of its divisors is an integer number (34445557).

Almost surely, 2^135559873 is an apocalyptic number.

It is an amenable number.

135559873 is a deficient number, since it is larger than the sum of its proper divisors (2222355).

135559873 is an equidigital number, since it uses as much as digits as its factorization.

135559873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2222354.

The product of its digits is 567000, while the sum is 46.

The square root of 135559873 is about 11643.0182083513. The cubic root of 135559873 is about 513.7009683988.

The spelling of 135559873 in words is "one hundred thirty-five million, five hundred fifty-nine thousand, eight hundred seventy-three".