135173065 has 4 divisors (see below), whose sum is σ = 162207684. Its totient is φ = 108138448.

The previous prime is 135173057. The next prime is 135173107. The reversal of 135173065 is 560371531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 560371531 = 31 ⋅18076501.

It can be written as a sum of positive squares in 2 ways, for example, as 26429881 + 108743184 = 5141^2 + 10428^2 .

It is a cyclic number.

It is not a de Polignac number, because 135173065 - 2³ = 135173057 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13517302 + ... + 13517311.

It is an arithmetic number, because the mean of its divisors is an integer number (40551921).

Almost surely, 2^135173065 is an apocalyptic number.

It is an amenable number.

135173065 is a deficient number, since it is larger than the sum of its proper divisors (27034619).

135173065 is an equidigital number, since it uses as much as digits as its factorization.

135173065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27034618.

The product of its (nonzero) digits is 9450, while the sum is 31.

The square root of 135173065 is about 11626.3951850950. The cubic root of 135173065 is about 513.2119029786.

The spelling of 135173065 in words is "one hundred thirty-five million, one hundred seventy-three thousand, sixty-five".