168672217 has 8 divisors (see below), whose sum is σ = 193456512. Its totient is φ = 144060000.

The previous prime is 168672173. The next prime is 168672223. The reversal of 168672217 is 712276861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 168672217 - 2⁷ = 168672089 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168672217.

It is not an unprimeable number, because it can be changed into a prime (168672227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40909 + ... + 44842.

It is an arithmetic number, because the mean of its divisors is an integer number (24182064).

Almost surely, 2^168672217 is an apocalyptic number.

It is an amenable number.

168672217 is a deficient number, since it is larger than the sum of its proper divisors (24784295).

168672217 is an equidigital number, since it uses as much as digits as its factorization.

168672217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86039.

The product of its digits is 56448, while the sum is 40.

The square root of 168672217 is about 12987.3868426254. The cubic root of 168672217 is about 552.5198065557.

The spelling of 168672217 in words is "one hundred sixty-eight million, six hundred seventy-two thousand, two hundred seventeen".