82877321 has 2 divisors, whose sum is σ = 82877322. Its totient is φ = 82877320.

The previous prime is 82877293. The next prime is 82877339. The reversal of 82877321 is 12377828.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61152400 + 21724921 = 7820^2 + 4661^2 .

It is a cyclic number.

It is not a de Polignac number, because 82877321 - 2¹⁴ = 82860937 is a prime.

It is a super-2 number, since 2×82877321² = 13737300672274082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (82877341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41438660 + 41438661.

It is an arithmetic number, because the mean of its divisors is an integer number (41438661).

Almost surely, 2^82877321 is an apocalyptic number.

It is an amenable number.

82877321 is a deficient number, since it is larger than the sum of its proper divisors (1).

82877321 is an equidigital number, since it uses as much as digits as its factorization.

82877321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37632, while the sum is 38.

The square root of 82877321 is about 9103.6982045760. The cubic root of 82877321 is about 435.9920477325.

The spelling of 82877321 in words is "eighty-two million, eight hundred seventy-seven thousand, three hundred twenty-one".