820932889 has 8 divisors (see below), whose sum is σ = 939673280. Its totient is φ = 702558576.

The previous prime is 820932881. The next prime is 820932911. The reversal of 820932889 is 988239028.

820932889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 820932889 - 2³ = 820932881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820932881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86694 + ... + 95695.

It is an arithmetic number, because the mean of its divisors is an integer number (117459160).

Almost surely, 2^820932889 is an apocalyptic number.

It is an amenable number.

820932889 is a deficient number, since it is larger than the sum of its proper divisors (118740391).

820932889 is a wasteful number, since it uses less digits than its factorization.

820932889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183039.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 820932889 is about 28651.9264448309. The cubic root of 820932889 is about 936.3449769513.

The spelling of 820932889 in words is "eight hundred twenty million, nine hundred thirty-two thousand, eight hundred eighty-nine".