161934485 has 4 divisors (see below), whose sum is σ = 194321388. Its totient is φ = 129547584.

The previous prime is 161934449. The next prime is 161934491. The reversal of 161934485 is 584439161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 584439161 = 37 ⋅15795653.

It can be written as a sum of positive squares in 2 ways, for example, as 104387089 + 57547396 = 10217^2 + 7586^2 .

It is a cyclic number.

It is not a de Polignac number, because 161934485 - 2¹⁰ = 161933461 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16193444 + ... + 16193453.

It is an arithmetic number, because the mean of its divisors is an integer number (48580347).

Almost surely, 2^161934485 is an apocalyptic number.

It is an amenable number.

161934485 is a deficient number, since it is larger than the sum of its proper divisors (32386903).

161934485 is an equidigital number, since it uses as much as digits as its factorization.

161934485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32386902.

The product of its digits is 103680, while the sum is 41.

The square root of 161934485 is about 12725.3481288333. The cubic root of 161934485 is about 545.0626811166.

The spelling of 161934485 in words is "one hundred sixty-one million, nine hundred thirty-four thousand, four hundred eighty-five".