820908711 has 18 divisors (see below), whose sum is σ = 1379350752. Its totient is φ = 469090440.

The previous prime is 820908619. The next prime is 820908731. The reversal of 820908711 is 117809028.

820908711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 820908711 - 2¹³ = 820900519 is a prime.

It is a super-2 number, since 2×820908711² = 1347782223591363042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820908731) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 930295 + ... + 931176.

Almost surely, 2^820908711 is an apocalyptic number.

820908711 is a deficient number, since it is larger than the sum of its proper divisors (558442041).

820908711 is a wasteful number, since it uses less digits than its factorization.

820908711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861491 (or 1861481 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 820908711 is about 28651.5045154700. The cubic root of 820908711 is about 936.3357844942.

The spelling of 820908711 in words is "eight hundred twenty million, nine hundred eight thousand, seven hundred eleven".