82161293 has 2 divisors, whose sum is σ = 82161294. Its totient is φ = 82161292.

The previous prime is 82161259. The next prime is 82161389. The reversal of 82161293 is 39216128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65334889 + 16826404 = 8083^2 + 4102^2 .

It is a cyclic number.

It is not a de Polignac number, because 82161293 - 2¹⁶ = 82095757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82161203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41080646 + 41080647.

It is an arithmetic number, because the mean of its divisors is an integer number (41080647).

Almost surely, 2^82161293 is an apocalyptic number.

It is an amenable number.

82161293 is a deficient number, since it is larger than the sum of its proper divisors (1).

82161293 is an equidigital number, since it uses as much as digits as its factorization.

82161293 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 82161293 is about 9064.2866790498. The cubic root of 82161293 is about 434.7328134176.

The spelling of 82161293 in words is "eighty-two million, one hundred sixty-one thousand, two hundred ninety-three".