135998859 has 8 divisors (see below), whose sum is σ = 181431360. Its totient is φ = 90616136.

The previous prime is 135998857. The next prime is 135998881. The reversal of 135998859 is 958899531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135998859 - 2¹ = 135998857 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135998799 and 135998808.

It is not an unprimeable number, because it can be changed into a prime (135998857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5517 + ... + 17390.

It is an arithmetic number, because the mean of its divisors is an integer number (22678920).

Almost surely, 2^135998859 is an apocalyptic number.

135998859 is a deficient number, since it is larger than the sum of its proper divisors (45432501).

135998859 is a wasteful number, since it uses less digits than its factorization.

135998859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24889.

The product of its digits is 3499200, while the sum is 57.

The square root of 135998859 is about 11661.8548696166. The cubic root of 135998859 is about 514.2548799745.

The spelling of 135998859 in words is "one hundred thirty-five million, nine hundred ninety-eight thousand, eight hundred fifty-nine".