135172873 has 4 divisors (see below), whose sum is σ = 147461328. Its totient is φ = 122884420.

The previous prime is 135172847. The next prime is 135172883. The reversal of 135172873 is 378271531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135172873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135172883) 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, 6144211 + ... + 6144232.

It is an arithmetic number, because the mean of its divisors is an integer number (36865332).

Almost surely, 2^135172873 is an apocalyptic number.

It is an amenable number.

135172873 is a deficient number, since it is larger than the sum of its proper divisors (12288455).

135172873 is a wasteful number, since it uses less digits than its factorization.

135172873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12288454.

The product of its digits is 35280, while the sum is 37.

The square root of 135172873 is about 11626.3869280185. The cubic root of 135172873 is about 513.2116599896.

The spelling of 135172873 in words is "one hundred thirty-five million, one hundred seventy-two thousand, eight hundred seventy-three".