135899507 has 4 divisors (see below), whose sum is σ = 136254720. Its totient is φ = 135544296.

The previous prime is 135899503. The next prime is 135899509. The reversal of 135899507 is 705998531.

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

It is a cyclic number.

It is not a de Polignac number, because 135899507 - 2² = 135899503 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135899503) 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 3 ways as a sum of consecutive naturals, for example, 177032 + ... + 177797.

It is an arithmetic number, because the mean of its divisors is an integer number (34063680).

Almost surely, 2^135899507 is an apocalyptic number.

135899507 is a deficient number, since it is larger than the sum of its proper divisors (355213).

135899507 is an equidigital number, since it uses as much as digits as its factorization.

135899507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355212.

The product of its (nonzero) digits is 340200, while the sum is 47.

The square root of 135899507 is about 11657.5943916402. The cubic root of 135899507 is about 514.1296223123.

The spelling of 135899507 in words is "one hundred thirty-five million, eight hundred ninety-nine thousand, five hundred seven".