820614673 has 2 divisors, whose sum is σ = 820614674. Its totient is φ = 820614672.

The previous prime is 820614647. The next prime is 820614679. The reversal of 820614673 is 376416028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 798175504 + 22439169 = 28252^2 + 4737^2 .

It is a cyclic number.

It is not a de Polignac number, because 820614673 - 2¹³ = 820606481 is a prime.

It is not a weakly prime, because it can be changed into another prime (820614679) 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, 410307336 + 410307337.

It is an arithmetic number, because the mean of its divisors is an integer number (410307337).

Almost surely, 2^820614673 is an apocalyptic number.

It is an amenable number.

820614673 is a deficient number, since it is larger than the sum of its proper divisors (1).

820614673 is an equidigital number, since it uses as much as digits as its factorization.

820614673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 820614673 is about 28646.3727721329. The cubic root of 820614673 is about 936.2239770236.

The spelling of 820614673 in words is "eight hundred twenty million, six hundred fourteen thousand, six hundred seventy-three".