135555899 has 8 divisors (see below), whose sum is σ = 142962240. Its totient is φ = 128176776.

The previous prime is 135555877. The next prime is 135555911. The reversal of 135555899 is 998555531.

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 135555899 - 2²⁰ = 134507323 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (135555809) 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, 3872 + ... + 16914.

It is an arithmetic number, because the mean of its divisors is an integer number (17870280).

Almost surely, 2^135555899 is an apocalyptic number.

135555899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

135555899 is a deficient number, since it is larger than the sum of its proper divisors (7406341).

135555899 is a wasteful number, since it uses less digits than its factorization.

135555899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13609.

The product of its digits is 1215000, while the sum is 50.

The square root of 135555899 is about 11642.8475468847. The cubic root of 135555899 is about 513.6959485564.

The spelling of 135555899 in words is "one hundred thirty-five million, five hundred fifty-five thousand, eight hundred ninety-nine".