82661849 has 2 divisors, whose sum is σ = 82661850. Its totient is φ = 82661848.

The previous prime is 82661833. The next prime is 82661851. The reversal of 82661849 is 94816628.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76877824 + 5784025 = 8768^2 + 2405^2 .

It is a cyclic number.

It is not a de Polignac number, because 82661849 - 2⁴ = 82661833 is a prime.

Together with 82661851, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82661809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41330924 + 41330925.

It is an arithmetic number, because the mean of its divisors is an integer number (41330925).

Almost surely, 2^82661849 is an apocalyptic number.

It is an amenable number.

82661849 is a deficient number, since it is larger than the sum of its proper divisors (1).

82661849 is an equidigital number, since it uses as much as digits as its factorization.

82661849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 44.

The square root of 82661849 is about 9091.8561911196. The cubic root of 82661849 is about 435.6138758758.

The spelling of 82661849 in words is "eighty-two million, six hundred sixty-one thousand, eight hundred forty-nine".