168520985 has 8 divisors (see below), whose sum is σ = 205073856. Its totient is φ = 132917680.

The previous prime is 168520951. The next prime is 168521009. The reversal of 168520985 is 589025861.

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

It is not a de Polignac number, because 168520985 - 2⁶ = 168520921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236999 + ... + 237708.

It is an arithmetic number, because the mean of its divisors is an integer number (25634232).

Almost surely, 2^168520985 is an apocalyptic number.

It is an amenable number.

168520985 is a deficient number, since it is larger than the sum of its proper divisors (36552871).

168520985 is an equidigital number, since it uses as much as digits as its factorization.

168520985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474783.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 168520985 is about 12981.5632725801. The cubic root of 168520985 is about 552.3546268909.

The spelling of 168520985 in words is "one hundred sixty-eight million, five hundred twenty thousand, nine hundred eighty-five".