80982779 has 2 divisors, whose sum is σ = 80982780. Its totient is φ = 80982778.

The previous prime is 80982773. The next prime is 80982827. The reversal of 80982779 is 97728908.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80982779 - 2¹² = 80978683 is a prime.

It is a super-3 number, since 3×80982779³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (80982773) 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, 40491389 + 40491390.

It is an arithmetic number, because the mean of its divisors is an integer number (40491390).

Almost surely, 2^80982779 is an apocalyptic number.

80982779 is a deficient number, since it is larger than the sum of its proper divisors (1).

80982779 is an equidigital number, since it uses as much as digits as its factorization.

80982779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 80982779 is about 8999.0432269214. The cubic root of 80982779 is about 432.6442059808.

The spelling of 80982779 in words is "eighty million, nine hundred eighty-two thousand, seven hundred seventy-nine".