136523 has 2 divisors, whose sum is σ = 136524. Its totient is φ = 136522.

The previous prime is 136519. The next prime is 136531. The reversal of 136523 is 325631.

It is a weak prime.

It is an emirp because it is prime and its reverse (325631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 136523 - 2² = 136519 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 136495 and 136504.

It is not a weakly prime, because it can be changed into another prime (136573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68261 + 68262.

It is an arithmetic number, because the mean of its divisors is an integer number (68262).

2¹³⁶⁵²³ is an apocalyptic number.

136523 is a deficient number, since it is larger than the sum of its proper divisors (1).

136523 is an equidigital number, since it uses as much as digits as its factorization.

136523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 20.

The square root of 136523 is about 369.4901893150. The cubic root of 136523 is about 51.4914680936.

Subtracting from 136523 its sum of digits (20), we obtain a triangular number (136503 = T₅₂₂).

The spelling of 136523 in words is "one hundred thirty-six thousand, five hundred twenty-three".