168391797 has 32 divisors (see below), whose sum is σ = 264225024. Its totient is φ = 93388800.

The previous prime is 168391793. The next prime is 168391807. The reversal of 168391797 is 797193861.

It is not a de Polignac number, because 168391797 - 2² = 168391793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168391793) 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 31 ways as a sum of consecutive naturals, for example, 220897 + ... + 221657.

It is an arithmetic number, because the mean of its divisors is an integer number (8257032).

Almost surely, 2^168391797 is an apocalyptic number.

It is an amenable number.

168391797 is a deficient number, since it is larger than the sum of its proper divisors (95833227).

168391797 is a wasteful number, since it uses less digits than its factorization.

168391797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069.

The product of its digits is 571536, while the sum is 51.

The square root of 168391797 is about 12976.5864926027. The cubic root of 168391797 is about 552.2134459938.

The spelling of 168391797 in words is "one hundred sixty-eight million, three hundred ninety-one thousand, seven hundred ninety-seven".