82541609 has 2 divisors, whose sum is σ = 82541610. Its totient is φ = 82541608.

The previous prime is 82541593. The next prime is 82541629. The reversal of 82541609 is 90614528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 7546009 = 8660^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 82541609 - 2⁴ = 82541593 is a prime.

It is not a weakly prime, because it can be changed into another prime (82541629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41270804 + 41270805.

It is an arithmetic number, because the mean of its divisors is an integer number (41270805).

Almost surely, 2^82541609 is an apocalyptic number.

It is an amenable number.

82541609 is a deficient number, since it is larger than the sum of its proper divisors (1).

82541609 is an equidigital number, since it uses as much as digits as its factorization.

82541609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 82541609 is about 9085.2412736261. The cubic root of 82541609 is about 435.4025586031.

The spelling of 82541609 in words is "eighty-two million, five hundred forty-one thousand, six hundred nine".