135539968 has 36 divisors (see below), whose sum is σ = 279895140. Its totient is φ = 65429504.

The previous prime is 135539959. The next prime is 135539981. The reversal of 135539968 is 869935531.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55830784 + 79709184 = 7472^2 + 8928^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705 + ... + 16552.

It is an arithmetic number, because the mean of its divisors is an integer number (7774865).

Almost surely, 2^135539968 is an apocalyptic number.

It is an amenable number.

135539968 is an abundant number, since it is smaller than the sum of its proper divisors (144355172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135539968 is an equidigital number, since it uses as much as digits as its factorization.

135539968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18302 (or 18288 counting only the distinct ones).

The product of its digits is 874800, while the sum is 49.

The square root of 135539968 is about 11642.1633728444. The cubic root of 135539968 is about 513.6758239907.

The spelling of 135539968 in words is "one hundred thirty-five million, five hundred thirty-nine thousand, nine hundred sixty-eight".