135623 has 2 divisors, whose sum is σ = 135624. Its totient is φ = 135622.

The previous prime is 135617. The next prime is 135637. The reversal of 135623 is 326531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135623 - 2⁴ = 135607 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135595 and 135604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67811 + 67812.

It is an arithmetic number, because the mean of its divisors is an integer number (67812).

2¹³⁵⁶²³ is an apocalyptic number.

135623 is a deficient number, since it is larger than the sum of its proper divisors (1).

135623 is an equidigital number, since it uses as much as digits as its factorization.

135623 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 135623 is about 368.2702811795. The cubic root of 135623 is about 51.3780695454.

The spelling of 135623 in words is "one hundred thirty-five thousand, six hundred twenty-three".