136685 has 4 divisors (see below), whose sum is σ = 164028. Its totient is φ = 109344.

The previous prime is 136657. The next prime is 136691. The reversal of 136685 is 586631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 42436 = 307^2 + 206^2 .

It is a cyclic number.

It is not a de Polignac number, because 136685 - 2⁶ = 136621 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 13664 + ... + 13673.

It is an arithmetic number, because the mean of its divisors is an integer number (41007).

2¹³⁶⁶⁸⁵ is an apocalyptic number.

It is an amenable number.

136685 is a deficient number, since it is larger than the sum of its proper divisors (27343).

136685 is an equidigital number, since it uses as much as digits as its factorization.

136685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27342.

The product of its digits is 4320, while the sum is 29.

The square root of 136685 is about 369.7093452971. The cubic root of 136685 is about 51.5118268624.

The spelling of 136685 in words is "one hundred thirty-six thousand, six hundred eighty-five".