82420973 has 2 divisors, whose sum is σ = 82420974. Its totient is φ = 82420972.

The previous prime is 82420967. The next prime is 82421039. The reversal of 82420973 is 37902428.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41499364 + 40921609 = 6442^2 + 6397^2 .

It is a cyclic number.

It is not a de Polignac number, because 82420973 - 2¹² = 82416877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82420673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41210486 + 41210487.

It is an arithmetic number, because the mean of its divisors is an integer number (41210487).

Almost surely, 2^82420973 is an apocalyptic number.

It is an amenable number.

82420973 is a deficient number, since it is larger than the sum of its proper divisors (1).

82420973 is an equidigital number, since it uses as much as digits as its factorization.

82420973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 82420973 is about 9078.5997268301. The cubic root of 82420973 is about 435.1903390396.

The spelling of 82420973 in words is "eighty-two million, four hundred twenty thousand, nine hundred seventy-three".