82889161 has 4 divisors (see below), whose sum is σ = 87765012. Its totient is φ = 78013312.

The previous prime is 82889141. The next prime is 82889173. The reversal of 82889161 is 16198828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24443136 + 58446025 = 4944^2 + 7645^2 .

It is a cyclic number.

It is not a de Polignac number, because 82889161 - 2¹¹ = 82887113 is a prime.

It is a super-2 number, since 2×82889161² = 13741226022567842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82889101) 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 3 ways as a sum of consecutive naturals, for example, 2437900 + ... + 2437933.

It is an arithmetic number, because the mean of its divisors is an integer number (21941253).

Almost surely, 2^82889161 is an apocalyptic number.

It is an amenable number.

82889161 is a deficient number, since it is larger than the sum of its proper divisors (4875851).

82889161 is a wasteful number, since it uses less digits than its factorization.

82889161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4875850.

The product of its digits is 55296, while the sum is 43.

The square root of 82889161 is about 9104.3484665296. The cubic root of 82889161 is about 436.0128089411.

The spelling of 82889161 in words is "eighty-two million, eight hundred eighty-nine thousand, one hundred sixty-one".