168968969 has 8 divisors (see below), whose sum is σ = 182425992. Its totient is φ = 155577600.

The previous prime is 168968923. The next prime is 168968983. The reversal of 168968969 is 969869861.

It can be written as a sum of positive squares in 4 ways, for example, as 83960569 + 85008400 = 9163^2 + 9220^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168968969 is a prime.

It is a super-2 number, since 2×168968969² = 57101024969845922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168968269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10994 + ... + 21419.

It is an arithmetic number, because the mean of its divisors is an integer number (22803249).

Almost surely, 2^168968969 is an apocalyptic number.

It is an amenable number.

168968969 is a deficient number, since it is larger than the sum of its proper divisors (13457023).

168968969 is a wasteful number, since it uses less digits than its factorization.

168968969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32827.

The product of its digits is 10077696, while the sum is 62.

The square root of 168968969 is about 12998.8064452087. The cubic root of 168968969 is about 552.8436403594.

The spelling of 168968969 in words is "one hundred sixty-eight million, nine hundred sixty-eight thousand, nine hundred sixty-nine".