172806071 has 4 divisors (see below), whose sum is σ = 182971152. Its totient is φ = 162640992.

The previous prime is 172806047. The next prime is 172806079. The reversal of 172806071 is 170608271.

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

It is a cyclic number.

It is not a de Polignac number, because 172806071 - 2²² = 168611767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172806079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5082515 + ... + 5082548.

It is an arithmetic number, because the mean of its divisors is an integer number (45742788).

Almost surely, 2^172806071 is an apocalyptic number.

172806071 is a deficient number, since it is larger than the sum of its proper divisors (10165081).

172806071 is a wasteful number, since it uses less digits than its factorization.

172806071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10165080.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 172806071 is about 13145.5722964046. The cubic root of 172806071 is about 556.9971828937.

The spelling of 172806071 in words is "one hundred seventy-two million, eight hundred six thousand, seventy-one".