135968138 has 8 divisors (see below), whose sum is σ = 204003360. Its totient is φ = 67967020.

The previous prime is 135968117. The next prime is 135968141. The reversal of 135968138 is 831869531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7373 + ... + 18063.

It is an arithmetic number, because the mean of its divisors is an integer number (25500420).

Almost surely, 2^135968138 is an apocalyptic number.

135968138 is a deficient number, since it is larger than the sum of its proper divisors (68035222).

135968138 is a wasteful number, since it uses less digits than its factorization.

135968138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17052.

The product of its digits is 155520, while the sum is 44.

The square root of 135968138 is about 11660.5376376906. The cubic root of 135968138 is about 514.2161551058.

The spelling of 135968138 in words is "one hundred thirty-five million, nine hundred sixty-eight thousand, one hundred thirty-eight".