168688539 has 12 divisors (see below), whose sum is σ = 244900656. Its totient is φ = 111886992.

The previous prime is 168688469. The next prime is 168688567. The reversal of 168688539 is 935886861.

It is not a de Polignac number, because 168688539 - 2⁸ = 168688283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168688579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45799 + ... + 49344.

It is an arithmetic number, because the mean of its divisors is an integer number (20408388).

Almost surely, 2^168688539 is an apocalyptic number.

168688539 is a deficient number, since it is larger than the sum of its proper divisors (76212117).

168688539 is a wasteful number, since it uses less digits than its factorization.

168688539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95346 (or 95343 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 168688539 is about 12988.0152063354. The cubic root of 168688539 is about 552.5376279799.

The spelling of 168688539 in words is "one hundred sixty-eight million, six hundred eighty-eight thousand, five hundred thirty-nine".