82909161 has 6 divisors (see below), whose sum is σ = 119757690. Its totient is φ = 55272768.

The previous prime is 82909111. The next prime is 82909163. The reversal of 82909161 is 16190928.

It can be written as a sum of positive squares in only one way, i.e., 82355625 + 553536 = 9075^2 + 744^2 .

It is not a de Polignac number, because 82909161 - 2⁷ = 82909033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (82909163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4606056 + ... + 4606073.

It is an arithmetic number, because the mean of its divisors is an integer number (19959615).

Almost surely, 2^82909161 is an apocalyptic number.

It is an amenable number.

82909161 is a deficient number, since it is larger than the sum of its proper divisors (36848529).

82909161 is a wasteful number, since it uses less digits than its factorization.

82909161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9212135 (or 9212132 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 82909161 is about 9105.4467765179. The cubic root of 82909161 is about 436.0478740602.

The spelling of 82909161 in words is "eighty-two million, nine hundred nine thousand, one hundred sixty-one".