172816117 has 4 divisors (see below), whose sum is σ = 174135456. Its totient is φ = 171496780.

The previous prime is 172816099. The next prime is 172816123. The reversal of 172816117 is 711618271.

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 not a de Polignac number, because 172816117 - 2²³ = 164427509 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 (172816157) 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, 659473 + ... + 659734.

It is an arithmetic number, because the mean of its divisors is an integer number (43533864).

Almost surely, 2^172816117 is an apocalyptic number.

It is an amenable number.

172816117 is a deficient number, since it is larger than the sum of its proper divisors (1319339).

172816117 is a wasteful number, since it uses less digits than its factorization.

172816117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319338.

The product of its digits is 4704, while the sum is 34.

The square root of 172816117 is about 13145.9543966956. The cubic root of 172816117 is about 557.0079762746.

The spelling of 172816117 in words is "one hundred seventy-two million, eight hundred sixteen thousand, one hundred seventeen".