135954523 has 4 divisors (see below), whose sum is σ = 140642640. Its totient is φ = 131266408.

The previous prime is 135954517. The next prime is 135954527. The reversal of 135954523 is 325459531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325459531 = 19 ⋅17129449.

It is a cyclic number.

It is not a de Polignac number, because 135954523 - 2⁹ = 135954011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135954527) 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, 2344015 + ... + 2344072.

It is an arithmetic number, because the mean of its divisors is an integer number (35160660).

Almost surely, 2^135954523 is an apocalyptic number.

135954523 is a deficient number, since it is larger than the sum of its proper divisors (4688117).

135954523 is an equidigital number, since it uses as much as digits as its factorization.

135954523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688116.

The product of its digits is 81000, while the sum is 37.

The square root of 135954523 is about 11659.9538163751. The cubic root of 135954523 is about 514.1989910683.

The spelling of 135954523 in words is "one hundred thirty-five million, nine hundred fifty-four thousand, five hundred twenty-three".