168720347 has 8 divisors (see below), whose sum is σ = 178598640. Its totient is φ = 159112800.

The previous prime is 168720329. The next prime is 168720367. The reversal of 168720347 is 743027861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168720347 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 168720347.

It is not an unprimeable number, because it can be changed into a prime (168720317) 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 7 ways as a sum of consecutive naturals, for example, 66404 + ... + 68897.

It is an arithmetic number, because the mean of its divisors is an integer number (22324830).

Almost surely, 2^168720347 is an apocalyptic number.

168720347 is a deficient number, since it is larger than the sum of its proper divisors (9878293).

168720347 is a wasteful number, since it uses less digits than its factorization.

168720347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135373.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 168720347 is about 12989.2396621203. The cubic root of 168720347 is about 552.5723547263.

The spelling of 168720347 in words is "one hundred sixty-eight million, seven hundred twenty thousand, three hundred forty-seven".