135681347 has 8 divisors (see below), whose sum is σ = 142882080. Its totient is φ = 128589120.

The previous prime is 135681323. The next prime is 135681349. The reversal of 135681347 is 743186531.

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

It is a cyclic number.

It is not a de Polignac number, because 135681347 - 2⁶ = 135681283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 135681347.

It is not an unprimeable number, because it can be changed into a prime (135681349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24554 + ... + 29567.

It is an arithmetic number, because the mean of its divisors is an integer number (17860260).

Almost surely, 2^135681347 is an apocalyptic number.

135681347 is a deficient number, since it is larger than the sum of its proper divisors (7200733).

135681347 is a wasteful number, since it uses less digits than its factorization.

135681347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54253.

The product of its digits is 60480, while the sum is 38.

The square root of 135681347 is about 11648.2336429177. The cubic root of 135681347 is about 513.8543635499.

The spelling of 135681347 in words is "one hundred thirty-five million, six hundred eighty-one thousand, three hundred forty-seven".