168686869 has 16 divisors (see below), whose sum is σ = 192894912. Its totient is φ = 146135808.

The previous prime is 168686821. The next prime is 168686873. The reversal of 168686869 is 968686861.

168686869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168686869 - 2¹¹ = 168684821 is a prime.

It is a super-2 number, since 2×168686869² = 56910519546046322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168686879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97042 + ... + 98764.

It is an arithmetic number, because the mean of its divisors is an integer number (12055932).

Almost surely, 2^168686869 is an apocalyptic number.

It is an amenable number.

168686869 is a deficient number, since it is larger than the sum of its proper divisors (24208043).

168686869 is a wasteful number, since it uses less digits than its factorization.

168686869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196.

The product of its digits is 5971968, while the sum is 58.

The square root of 168686869 is about 12987.9509161376. The cubic root of 168686869 is about 552.5358046178.

The spelling of 168686869 in words is "one hundred sixty-eight million, six hundred eighty-six thousand, eight hundred sixty-nine".