82409161 has 4 divisors (see below), whose sum is σ = 85992192. Its totient is φ = 78826132.

The previous prime is 82409147. The next prime is 82409219. The reversal of 82409161 is 16190428.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82409161 - 2¹¹ = 82407113 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82409141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1791481 + ... + 1791526.

It is an arithmetic number, because the mean of its divisors is an integer number (21498048).

Almost surely, 2^82409161 is an apocalyptic number.

It is an amenable number.

82409161 is a deficient number, since it is larger than the sum of its proper divisors (3583031).

82409161 is a wasteful number, since it uses less digits than its factorization.

82409161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583030.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 82409161 is about 9077.9491626688. The cubic root of 82409161 is about 435.1695485633.

Adding to 82409161 its reverse (16190428), we get a palindrome (98599589).

The spelling of 82409161 in words is "eighty-two million, four hundred nine thousand, one hundred sixty-one".