135985959 has 48 divisors (see below), whose sum is σ = 220147200. Its totient is φ = 83625696.

The previous prime is 135985951. The next prime is 135985961. The reversal of 135985959 is 959589531.

It is a happy number.

It is not a de Polignac number, because 135985959 - 2³ = 135985951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135985951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161662 + ... + 162500.

It is an arithmetic number, because the mean of its divisors is an integer number (4586400).

Almost surely, 2^135985959 is an apocalyptic number.

135985959 is a deficient number, since it is larger than the sum of its proper divisors (84161241).

135985959 is an equidigital number, since it uses as much as digits as its factorization.

135985959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 894 counting only the distinct ones).

The product of its digits is 2187000, while the sum is 54.

The square root of 135985959 is about 11661.3017712432. The cubic root of 135985959 is about 514.2386197947.

The spelling of 135985959 in words is "one hundred thirty-five million, nine hundred eighty-five thousand, nine hundred fifty-nine".