168968986 has 8 divisors (see below), whose sum is σ = 253510740. Its totient is φ = 84465408.

The previous prime is 168968983. The next prime is 168969043. The reversal of 168968986 is 689869861.

It can be written as a sum of positive squares in 2 ways, for example, as 162078361 + 6890625 = 12731^2 + 2625^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (168968983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7900 + ... + 20008.

Almost surely, 2^168968986 is an apocalyptic number.

168968986 is a deficient number, since it is larger than the sum of its proper divisors (84541754).

168968986 is a wasteful number, since it uses less digits than its factorization.

168968986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19088.

The product of its digits is 8957952, while the sum is 61.

The square root of 168968986 is about 12998.8070991149. The cubic root of 168968986 is about 552.8436589000.

The spelling of 168968986 in words is "one hundred sixty-eight million, nine hundred sixty-eight thousand, nine hundred eighty-six".