168298729 has 3 divisors (see below), whose sum is σ = 168311703. Its totient is φ = 168285756.

The previous prime is 168298717. The next prime is 168298747. The reversal of 168298729 is 927892861.

The square root of 168298729 is 12973.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 167650704 = 805^2 + 12948^2 .

It is not a de Polignac number, because 168298729 - 2⁹ = 168298217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168296729) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6487 + ... + 19459.

It is an arithmetic number, because the mean of its divisors is an integer number (56103901).

Almost surely, 2^168298729 is an apocalyptic number.

168298729 is the 12973-rd square number.

168298729 is the 6487-th centered octagonal number.

It is an amenable number.

168298729 is a deficient number, since it is larger than the sum of its proper divisors (12974).

168298729 is an frugal number, since it uses more digits than its factorization.

168298729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25946 (or 12973 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The cubic root of 168298729 is about 552.1116934679. Note that the first 3 decimals are identical.

The spelling of 168298729 in words is "one hundred sixty-eight million, two hundred ninety-eight thousand, seven hundred twenty-nine".