82161873 has 24 divisors (see below), whose sum is σ = 123259136. Its totient is φ = 52682400.

The previous prime is 82161869. The next prime is 82161887. The reversal of 82161873 is 37816128.

It is not a de Polignac number, because 82161873 - 2² = 82161869 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82161853) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 49686 + ... + 51312.

Almost surely, 2^82161873 is an apocalyptic number.

It is an amenable number.

82161873 is a deficient number, since it is larger than the sum of its proper divisors (41097263).

82161873 is a wasteful number, since it uses less digits than its factorization.

82161873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845 (or 1842 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 82161873 is about 9064.3186726858. The cubic root of 82161873 is about 434.7338363829.

The spelling of 82161873 in words is "eighty-two million, one hundred sixty-one thousand, eight hundred seventy-three".