168306986 has 8 divisors (see below), whose sum is σ = 253268004. Its totient is φ = 83884320.

The previous prime is 168306961. The next prime is 168307003. The reversal of 168306986 is 689603861.

It can be written as a sum of positive squares in 2 ways, for example, as 143256961 + 25050025 = 11969^2 + 5005^2 .

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 168306986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133805 + ... + 135056.

Almost surely, 2^168306986 is an apocalyptic number.

168306986 is a deficient number, since it is larger than the sum of its proper divisors (84961018).

168306986 is a wasteful number, since it uses less digits than its factorization.

168306986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269176.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 168306986 is about 12973.3182339755. The cubic root of 168306986 is about 552.1207224758.

The spelling of 168306986 in words is "one hundred sixty-eight million, three hundred six thousand, nine hundred eighty-six".