820773827 has 2 divisors, whose sum is σ = 820773828. Its totient is φ = 820773826.

The previous prime is 820773823. The next prime is 820773841. The reversal of 820773827 is 728377028.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820773827 - 2² = 820773823 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (820773823) 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, 410386913 + 410386914.

It is an arithmetic number, because the mean of its divisors is an integer number (410386914).

Almost surely, 2^820773827 is an apocalyptic number.

820773827 is a deficient number, since it is larger than the sum of its proper divisors (1).

820773827 is an equidigital number, since it uses as much as digits as its factorization.

820773827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 263424, while the sum is 44.

The square root of 820773827 is about 28649.1505458713. The cubic root of 820773827 is about 936.2844983880.

The spelling of 820773827 in words is "eight hundred twenty million, seven hundred seventy-three thousand, eight hundred twenty-seven".