169968939 has 16 divisors (see below), whose sum is σ = 267356160. Its totient is φ = 93991680.

The previous prime is 169968937. The next prime is 169968943. The reversal of 169968939 is 939869961.

It is not a de Polignac number, because 169968939 - 2¹ = 169968937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (169968937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129894 + ... + 131195.

It is an arithmetic number, because the mean of its divisors is an integer number (16709760).

Almost surely, 2^169968939 is an apocalyptic number.

169968939 is a deficient number, since it is larger than the sum of its proper divisors (97387221).

169968939 is a wasteful number, since it uses less digits than its factorization.

169968939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261130.

The product of its digits is 5668704, while the sum is 60.

The square root of 169968939 is about 13037.2136210158. The cubic root of 169968939 is about 553.9320849292.

The spelling of 169968939 in words is "one hundred sixty-nine million, nine hundred sixty-eight thousand, nine hundred thirty-nine".