80221879 has 2 divisors, whose sum is σ = 80221880. Its totient is φ = 80221878.

The previous prime is 80221877. The next prime is 80221901. The reversal of 80221879 is 97812208.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80221879 - 2¹ = 80221877 is a prime.

Together with 80221877, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80221873) 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, 40110939 + 40110940.

It is an arithmetic number, because the mean of its divisors is an integer number (40110940).

Almost surely, 2^80221879 is an apocalyptic number.

80221879 is a deficient number, since it is larger than the sum of its proper divisors (1).

80221879 is an equidigital number, since it uses as much as digits as its factorization.

80221879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 80221879 is about 8956.6667348964. Note that the first 3 decimals coincide. The cubic root of 80221879 is about 431.2849234757.

The spelling of 80221879 in words is "eighty million, two hundred twenty-one thousand, eight hundred seventy-nine".