80221679 has 2 divisors, whose sum is σ = 80221680. Its totient is φ = 80221678.

The previous prime is 80221643. The next prime is 80221699. The reversal of 80221679 is 97612208.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80221679 - 2¹⁶ = 80156143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80221699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40110839 + 40110840.

It is an arithmetic number, because the mean of its divisors is an integer number (40110840).

Almost surely, 2^80221679 is an apocalyptic number.

80221679 is a deficient number, since it is larger than the sum of its proper divisors (1).

80221679 is an equidigital number, since it uses as much as digits as its factorization.

80221679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 80221679 is about 8956.6555700217. The cubic root of 80221679 is about 431.2845650654.

The spelling of 80221679 in words is "eighty million, two hundred twenty-one thousand, six hundred seventy-nine".