168704397 has 16 divisors (see below), whose sum is σ = 258552000. Its totient is φ = 108590832.

The previous prime is 168704359. The next prime is 168704399. The reversal of 168704397 is 793407861.

It is not a de Polignac number, because 168704397 - 2⁷ = 168704269 is a prime.

It is a super-2 number, since 2×168704397² = 56922347134267218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168704399) 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, 106947 + ... + 108512.

It is an arithmetic number, because the mean of its divisors is an integer number (16159500).

Almost surely, 2^168704397 is an apocalyptic number.

It is an amenable number.

168704397 is a deficient number, since it is larger than the sum of its proper divisors (89847603).

168704397 is a wasteful number, since it uses less digits than its factorization.

168704397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215497 (or 215491 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 168704397 is about 12988.6256778768. The cubic root of 168704397 is about 552.5549416777.

The spelling of 168704397 in words is "one hundred sixty-eight million, seven hundred four thousand, three hundred ninety-seven".