820059769 has 2 divisors, whose sum is σ = 820059770. Its totient is φ = 820059768.

The previous prime is 820059689. The next prime is 820059791. The reversal of 820059769 is 967950028.

820059769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619412544 + 200647225 = 24888^2 + 14165^2 .

It is a cyclic number.

It is not a de Polignac number, because 820059769 - 2⁹ = 820059257 is a prime.

It is a super-2 number, since 2×820059769² = 1344996049464666722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (820059269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410029884 + 410029885.

It is an arithmetic number, because the mean of its divisors is an integer number (410029885).

Almost surely, 2^820059769 is an apocalyptic number.

It is an amenable number.

820059769 is a deficient number, since it is larger than the sum of its proper divisors (1).

820059769 is an equidigital number, since it uses as much as digits as its factorization.

820059769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 820059769 is about 28636.6857195451. The cubic root of 820059769 is about 936.0129028982.

The spelling of 820059769 in words is "eight hundred twenty million, fifty-nine thousand, seven hundred sixty-nine".