135899887 has 16 divisors (see below), whose sum is σ = 151329600. Its totient is φ = 121443840.

The previous prime is 135899867. The next prime is 135899891. The reversal of 135899887 is 788998531.

It is a cyclic number.

It is not a de Polignac number, because 135899887 - 2⁷ = 135899759 is a prime.

It is a super-2 number, since 2×135899887² = 36937558573225538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135899807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27814 + ... + 32332.

It is an arithmetic number, because the mean of its divisors is an integer number (9458100).

Almost surely, 2^135899887 is an apocalyptic number.

135899887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

135899887 is a deficient number, since it is larger than the sum of its proper divisors (15429713).

135899887 is a wasteful number, since it uses less digits than its factorization.

135899887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4626.

The product of its digits is 4354560, while the sum is 58.

The square root of 135899887 is about 11657.6106900171. The cubic root of 135899887 is about 514.1301015121.

The spelling of 135899887 in words is "one hundred thirty-five million, eight hundred ninety-nine thousand, eight hundred eighty-seven".