82001639 has 2 divisors, whose sum is σ = 82001640. Its totient is φ = 82001638.

The previous prime is 82001627. The next prime is 82001641. The reversal of 82001639 is 93610028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82001639 - 2⁸ = 82001383 is a prime.

Together with 82001641, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82001669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41000819 + 41000820.

It is an arithmetic number, because the mean of its divisors is an integer number (41000820).

Almost surely, 2^82001639 is an apocalyptic number.

82001639 is a deficient number, since it is larger than the sum of its proper divisors (1).

82001639 is an equidigital number, since it uses as much as digits as its factorization.

82001639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 82001639 is about 9055.4756363208. The cubic root of 82001639 is about 434.4510431125.

The spelling of 82001639 in words is "eighty-two million, one thousand, six hundred thirty-nine".