820580611 has 2 divisors, whose sum is σ = 820580612. Its totient is φ = 820580610.

The previous prime is 820580597. The next prime is 820580617. The reversal of 820580611 is 116085028.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 820580611 - 2⁷ = 820580483 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (820580617) 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, 410290305 + 410290306.

It is an arithmetic number, because the mean of its divisors is an integer number (410290306).

Almost surely, 2^820580611 is an apocalyptic number.

820580611 is a deficient number, since it is larger than the sum of its proper divisors (1).

820580611 is an equidigital number, since it uses as much as digits as its factorization.

820580611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 820580611 is about 28645.7782404319. The cubic root of 820580611 is about 936.2110232775.

The spelling of 820580611 in words is "eight hundred twenty million, five hundred eighty thousand, six hundred eleven".