135321523 has 2 divisors, whose sum is σ = 135321524. Its totient is φ = 135321522.

The previous prime is 135321521. The next prime is 135321577. The reversal of 135321523 is 325123531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135321523 - 2¹ = 135321521 is a prime.

Together with 135321521, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135321521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67660761 + 67660762.

It is an arithmetic number, because the mean of its divisors is an integer number (67660762).

Almost surely, 2^135321523 is an apocalyptic number.

135321523 is a deficient number, since it is larger than the sum of its proper divisors (1).

135321523 is an equidigital number, since it uses as much as digits as its factorization.

135321523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 25.

The square root of 135321523 is about 11632.7779571347. Note that the first 3 decimals coincide. The cubic root of 135321523 is about 513.3997178535.

The spelling of 135321523 in words is "one hundred thirty-five million, three hundred twenty-one thousand, five hundred twenty-three".