169036985 has 8 divisors (see below), whose sum is σ = 218447880. Its totient is φ = 124827264.

The previous prime is 169036943. The next prime is 169036997. The reversal of 169036985 is 589630961.

It can be written as a sum of positive squares in 4 ways, for example, as 37613689 + 131423296 = 6133^2 + 11464^2 .

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 169036985 - 2⁶ = 169036921 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon 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, 1300220 + ... + 1300349.

It is an arithmetic number, because the mean of its divisors is an integer number (27305985).

Almost surely, 2^169036985 is an apocalyptic number.

It is an amenable number.

169036985 is a deficient number, since it is larger than the sum of its proper divisors (49410895).

169036985 is a wasteful number, since it uses less digits than its factorization.

169036985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600587.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 169036985 is about 13001.4224221814. The cubic root of 169036985 is about 552.9178101295.

The spelling of 169036985 in words is "one hundred sixty-nine million, thirty-six thousand, nine hundred eighty-five".