168241889929 has 3 divisors (see below), whose sum is σ = 168242300103. Its totient is φ = 168241479756.

The previous prime is 168241889911. The next prime is 168241889939. The reversal of 168241889929 is 929988142861.

The square root of 168241889929 is 410173.

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., 15476604025 + 152765285904 = 124405^2 + 390852^2 .

It is not a de Polignac number, because 168241889929 - 2⁵ = 168241889897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168241889939) 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, 205087 + ... + 615259.

It is an arithmetic number, because the mean of its divisors is an integer number (56080766701).

Almost surely, 2^168241889929 is an apocalyptic number.

168241889929 is the 410173-rd square number.

168241889929 is the 205087-th centered octagonal number.

It is an amenable number.

168241889929 is a deficient number, since it is larger than the sum of its proper divisors (410174).

168241889929 is an frugal number, since it uses more digits than its factorization.

168241889929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820346 (or 410173 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 67.

The spelling of 168241889929 in words is "one hundred sixty-eight billion, two hundred forty-one million, eight hundred eighty-nine thousand, nine hundred twenty-nine".