168769217 has 8 divisors (see below), whose sum is σ = 179128872. Its totient is φ = 158457600.

The previous prime is 168769207. The next prime is 168769231. The reversal of 168769217 is 712967861.

It can be written as a sum of positive squares in 4 ways, for example, as 703921 + 168065296 = 839^2 + 12964^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 168769217 - 2⁸ = 168768961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168769207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4634 + ... + 18947.

It is an arithmetic number, because the mean of its divisors is an integer number (22391109).

Almost surely, 2^168769217 is an apocalyptic number.

168769217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

168769217 is a deficient number, since it is larger than the sum of its proper divisors (10359655).

168769217 is a wasteful number, since it uses less digits than its factorization.

168769217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24019.

The product of its digits is 254016, while the sum is 47.

The square root of 168769217 is about 12991.1206983847. The cubic root of 168769217 is about 552.6257006023.

The spelling of 168769217 in words is "one hundred sixty-eight million, seven hundred sixty-nine thousand, two hundred seventeen".