136688 has 10 divisors (see below), whose sum is σ = 264864. Its totient is φ = 68336.

The previous prime is 136657. The next prime is 136691. The reversal of 136688 is 886631.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

136688 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4256 + ... + 4287.

2¹³⁶⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

136688 is a deficient number, since it is larger than the sum of its proper divisors (128176).

136688 is an equidigital number, since it uses as much as digits as its factorization.

136688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8551 (or 8545 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 136688 is about 369.7134025161. The cubic root of 136688 is about 51.5122037249.

The spelling of 136688 in words is "one hundred thirty-six thousand, six hundred eighty-eight".