136387 has 4 divisors (see below), whose sum is σ = 141120. Its totient is φ = 131656.

The previous prime is 136379. The next prime is 136393. The reversal of 136387 is 783631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 783631 = 47 ⋅16673.

It is a cyclic number.

It is not a de Polignac number, because 136387 - 2³ = 136379 is a prime.

It is a Duffinian number.

136387 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (136327) by changing a digit.

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, 2323 + ... + 2380.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2¹³⁶³⁸⁷ is an apocalyptic number.

136387 is a deficient number, since it is larger than the sum of its proper divisors (4733).

136387 is an equidigital number, since it uses as much as digits as its factorization.

136387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732.

The product of its digits is 3024, while the sum is 28.

The square root of 136387 is about 369.3061060963. The cubic root of 136387 is about 51.4743643424.

It can be divided in two parts, 13 and 6387, that added together give a square (6400 = 80²).

The spelling of 136387 in words is "one hundred thirty-six thousand, three hundred eighty-seven".