169899968 has 56 divisors (see below), whose sum is σ = 386571744. Its totient is φ = 72576000.

The previous prime is 169899937. The next prime is 169899973. The reversal of 169899968 is 869998961.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 242018 + ... + 242718.

Almost surely, 2^169899968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169899968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193285872).

169899968 is an abundant number, since it is smaller than the sum of its proper divisors (216671776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

169899968 is an equidigital number, since it uses as much as digits as its factorization.

169899968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261 (or 1251 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 65.

The square root of 169899968 is about 13034.5681938452. The cubic root of 169899968 is about 553.8571488479.

The spelling of 169899968 in words is "one hundred sixty-nine million, eight hundred ninety-nine thousand, nine hundred sixty-eight".