82312661 has 2 divisors, whose sum is σ = 82312662. Its totient is φ = 82312660.

The previous prime is 82312631. The next prime is 82312663. The reversal of 82312661 is 16621328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67141636 + 15171025 = 8194^2 + 3895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82312661 is a prime.

Together with 82312663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82312663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41156330 + 41156331.

It is an arithmetic number, because the mean of its divisors is an integer number (41156331).

Almost surely, 2^82312661 is an apocalyptic number.

It is an amenable number.

82312661 is a deficient number, since it is larger than the sum of its proper divisors (1).

82312661 is an equidigital number, since it uses as much as digits as its factorization.

82312661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 29.

The square root of 82312661 is about 9072.6325286545. The cubic root of 82312661 is about 434.9996230234. Note that the first 3 decimals are identical.

Adding to 82312661 its reverse (16621328), we get a palindrome (98933989).

The spelling of 82312661 in words is "eighty-two million, three hundred twelve thousand, six hundred sixty-one".