168997797 has 12 divisors (see below), whose sum is σ = 244312224. Its totient is φ = 112570920.

The previous prime is 168997793. The next prime is 168997823. The reversal of 168997797 is 797799861.

It is not a de Polignac number, because 168997797 - 2² = 168997793 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168997793) 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 11 ways as a sum of consecutive naturals, for example, 4522 + ... + 18932.

It is an arithmetic number, because the mean of its divisors is an integer number (20359352).

Almost surely, 2^168997797 is an apocalyptic number.

It is an amenable number.

168997797 is a deficient number, since it is larger than the sum of its proper divisors (75314427).

168997797 is a wasteful number, since it uses less digits than its factorization.

168997797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15720 (or 15717 counting only the distinct ones).

The product of its digits is 12002256, while the sum is 63.

The square root of 168997797 is about 12999.9152689546. The cubic root of 168997797 is about 552.8750790121.

The spelling of 168997797 in words is "one hundred sixty-eight million, nine hundred ninety-seven thousand, seven hundred ninety-seven".