136623 has 4 divisors (see below), whose sum is σ = 182168. Its totient is φ = 91080.

The previous prime is 136621. The next prime is 136649. The reversal of 136623 is 326631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 326631 = 3 ⋅108877.

It is not a de Polignac number, because 136623 - 2¹ = 136621 is a prime.

It is a D-number.

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 136623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22768 + ... + 22773.

It is an arithmetic number, because the mean of its divisors is an integer number (45542).

2¹³⁶⁶²³ is an apocalyptic number.

136623 is a deficient number, since it is larger than the sum of its proper divisors (45545).

136623 is an equidigital number, since it uses as much as digits as its factorization.

136623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45544.

The product of its digits is 648, while the sum is 21.

The square root of 136623 is about 369.6254861343. The cubic root of 136623 is about 51.5040371360.

The spelling of 136623 in words is "one hundred thirty-six thousand, six hundred twenty-three".