82001641 has 2 divisors, whose sum is σ = 82001642. Its totient is φ = 82001640.

The previous prime is 82001639. The next prime is 82001651. The reversal of 82001641 is 14610028.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 13111641 = 8300^2 + 3621^2 .

It is a cyclic number.

It is not a de Polignac number, because 82001641 - 2¹ = 82001639 is a prime.

Together with 82001639, 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 (82001651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41000820 + 41000821.

It is an arithmetic number, because the mean of its divisors is an integer number (41000821).

Almost surely, 2^82001641 is an apocalyptic number.

It is an amenable number.

82001641 is a deficient number, since it is larger than the sum of its proper divisors (1).

82001641 is an equidigital number, since it uses as much as digits as its factorization.

82001641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 82001641 is about 9055.4757467512. The cubic root of 82001641 is about 434.4510466446.

Adding to 82001641 its reverse (14610028), we get a palindrome (96611669).

The spelling of 82001641 in words is "eighty-two million, one thousand, six hundred forty-one".