169634945 has 16 divisors (see below), whose sum is σ = 221191680. Its totient is φ = 124416000.

The previous prime is 169634921. The next prime is 169634947. The reversal of 169634945 is 549436961.

It is a happy number.

It is not a de Polignac number, because 169634945 - 2²² = 165440641 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 169634945.

It is not an unprimeable number, because it can be changed into a prime (169634947) 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, 25856 + ... + 31745.

It is an arithmetic number, because the mean of its divisors is an integer number (13824480).

Almost surely, 2^169634945 is an apocalyptic number.

It is an amenable number.

169634945 is a deficient number, since it is larger than the sum of its proper divisors (51556735).

169634945 is a wasteful number, since it uses less digits than its factorization.

169634945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57656.

The product of its digits is 699840, while the sum is 47.

The square root of 169634945 is about 13024.3980667054. The cubic root of 169634945 is about 553.5690160264.

The spelling of 169634945 in words is "one hundred sixty-nine million, six hundred thirty-four thousand, nine hundred forty-five".