168196986 has 20 divisors (see below), whose sum is σ = 376886202. Its totient is φ = 56065608.

The previous prime is 168196957. The next prime is 168196993. The reversal of 168196986 is 689691861.

It can be written as a sum of positive squares in only one way, i.e., 168194961 + 2025 = 12969^2 + 45^2 .

It is a super-3 number, since 3×168196986³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 518965 + ... + 519288.

Almost surely, 2^168196986 is an apocalyptic number.

168196986 is an abundant number, since it is smaller than the sum of its proper divisors (208689216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168196986 is a wasteful number, since it uses less digits than its factorization.

168196986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038267 (or 1038258 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 168196986 is about 12969.0780705492. The cubic root of 168196986 is about 552.0004135158. Note that the first 3 decimals are identical.

The spelling of 168196986 in words is "one hundred sixty-eight million, one hundred ninety-six thousand, nine hundred eighty-six".