820576913 has 8 divisors (see below), whose sum is σ = 912205056. Its totient is φ = 733021200.

The previous prime is 820576879. The next prime is 820576931. The reversal of 820576913 is 319675028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 820576913 - 2⁶ = 820576849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (820576963) 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 in 7 ways as a sum of consecutive naturals, for example, 1017683 + ... + 1018488.

It is an arithmetic number, because the mean of its divisors is an integer number (114025632).

Almost surely, 2^820576913 is an apocalyptic number.

It is an amenable number.

820576913 is a deficient number, since it is larger than the sum of its proper divisors (91628143).

820576913 is a wasteful number, since it uses less digits than its factorization.

820576913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036215.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 820576913 is about 28645.7136933259. The cubic root of 820576913 is about 936.2096169101.

The spelling of 820576913 in words is "eight hundred twenty million, five hundred seventy-six thousand, nine hundred thirteen".