135018517 has 4 divisors (see below), whose sum is σ = 136355436. Its totient is φ = 133681600.

The previous prime is 135018511. The next prime is 135018553. The reversal of 135018517 is 715810531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120318961 + 14699556 = 10969^2 + 3834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135018517 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135018511) 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, 668308 + ... + 668509.

It is an arithmetic number, because the mean of its divisors is an integer number (34088859).

Almost surely, 2^135018517 is an apocalyptic number.

It is an amenable number.

135018517 is a deficient number, since it is larger than the sum of its proper divisors (1336919).

135018517 is a wasteful number, since it uses less digits than its factorization.

135018517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336918.

The product of its (nonzero) digits is 4200, while the sum is 31.

The square root of 135018517 is about 11619.7468561066. The cubic root of 135018517 is about 513.0162374675.

The spelling of 135018517 in words is "one hundred thirty-five million, eighteen thousand, five hundred seventeen".