168723929 has 16 divisors (see below), whose sum is σ = 203368320. Its totient is φ = 138082560.

The previous prime is 168723923. The next prime is 168723949. The reversal of 168723929 is 929327861.

It is a happy number.

It is not a de Polignac number, because 168723929 - 2⁸ = 168723673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168723923) 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 15 ways as a sum of consecutive naturals, for example, 15314 + ... + 23915.

It is an arithmetic number, because the mean of its divisors is an integer number (12710520).

Almost surely, 2^168723929 is an apocalyptic number.

It is an amenable number.

168723929 is a deficient number, since it is larger than the sum of its proper divisors (34644391).

168723929 is a wasteful number, since it uses less digits than its factorization.

168723929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39280.

The product of its digits is 326592, while the sum is 47.

The square root of 168723929 is about 12989.3775447479. The cubic root of 168723929 is about 552.5762651422.

The spelling of 168723929 in words is "one hundred sixty-eight million, seven hundred twenty-three thousand, nine hundred twenty-nine".