136723 has 4 divisors (see below), whose sum is σ = 139680. Its totient is φ = 133768.

The previous prime is 136711. The next prime is 136727. The reversal of 136723 is 327631.

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

It is a cyclic number.

It is not a de Polignac number, because 136723 - 2⁵ = 136691 is a prime.

It is a Duffinian number.

136723 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 136694 and 136703.

It is not an unprimeable number, because it can be changed into a prime (136727) 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, 1408 + ... + 1501.

It is an arithmetic number, because the mean of its divisors is an integer number (34920).

2¹³⁶⁷²³ is an apocalyptic number.

136723 is a deficient number, since it is larger than the sum of its proper divisors (2957).

136723 is an equidigital number, since it uses as much as digits as its factorization.

136723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2956.

The product of its digits is 756, while the sum is 22.

The square root of 136723 is about 369.7607334480. The cubic root of 136723 is about 51.5166000466.

The spelling of 136723 in words is "one hundred thirty-six thousand, seven hundred twenty-three".