80220689 has 2 divisors, whose sum is σ = 80220690. Its totient is φ = 80220688.

The previous prime is 80220677. The next prime is 80220691. The reversal of 80220689 is 98602208.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75777025 + 4443664 = 8705^2 + 2108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80220689 is a prime.

Together with 80220691, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4681448 and since 80220689 and 4681448 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (80220659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40110344 + 40110345.

It is an arithmetic number, because the mean of its divisors is an integer number (40110345).

Almost surely, 2^80220689 is an apocalyptic number.

It is an amenable number.

80220689 is a deficient number, since it is larger than the sum of its proper divisors (1).

80220689 is an equidigital number, since it uses as much as digits as its factorization.

80220689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 80220689 is about 8956.6003036867. The cubic root of 80220689 is about 431.2827909254.

The spelling of 80220689 in words is "eighty million, two hundred twenty thousand, six hundred eighty-nine".