168117929 has 16 divisors (see below), whose sum is σ = 198967296. Its totient is φ = 139006800.

The previous prime is 168117923. The next prime is 168117931. The reversal of 168117929 is 929711861.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168117929 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 168117929.

It is not an unprimeable number, because it can be changed into a prime (168117923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78584 + ... + 80694.

It is an arithmetic number, because the mean of its divisors is an integer number (12435456).

Almost surely, 2^168117929 is an apocalyptic number.

It is an amenable number.

168117929 is a deficient number, since it is larger than the sum of its proper divisors (30849367).

168117929 is a wasteful number, since it uses less digits than its factorization.

168117929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516.

The product of its digits is 54432, while the sum is 44.

The square root of 168117929 is about 12966.0298086963. The cubic root of 168117929 is about 551.9139150658.

The spelling of 168117929 in words is "one hundred sixty-eight million, one hundred seventeen thousand, nine hundred twenty-nine".