169820985 has 8 divisors (see below), whose sum is σ = 271713600. Its totient is φ = 90571184.

The previous prime is 169820977. The next prime is 169821017. The reversal of 169820985 is 589028961.

It is a happy number.

169820985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 169820985 - 2³ = 169820977 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5660685 + ... + 5660714.

It is an arithmetic number, because the mean of its divisors is an integer number (33964200).

Almost surely, 2^169820985 is an apocalyptic number.

169820985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

169820985 is a deficient number, since it is larger than the sum of its proper divisors (101892615).

169820985 is a wasteful number, since it uses less digits than its factorization.

169820985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11321407.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 169820985 is about 13031.5380903407. The cubic root of 169820985 is about 553.7713099467.

The spelling of 169820985 in words is "one hundred sixty-nine million, eight hundred twenty thousand, nine hundred eighty-five".