80220779 has 2 divisors, whose sum is σ = 80220780. Its totient is φ = 80220778.

The previous prime is 80220743. The next prime is 80220781. The reversal of 80220779 is 97702208.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 80220779 - 2²⁴ = 63443563 is a prime.

It is a Sophie Germain prime.

Together with 80220781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80220709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40110389 + 40110390.

It is an arithmetic number, because the mean of its divisors is an integer number (40110390).

Almost surely, 2^80220779 is an apocalyptic number.

80220779 is a deficient number, since it is larger than the sum of its proper divisors (1).

80220779 is an equidigital number, since it uses as much as digits as its factorization.

80220779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 80220779 is about 8956.6053279130. The cubic root of 80220779 is about 431.2829522114.

The spelling of 80220779 in words is "eighty million, two hundred twenty thousand, seven hundred seventy-nine".