846478889 has 2 divisors, whose sum is σ = 846478890. Its totient is φ = 846478888.

The previous prime is 846478877. The next prime is 846478891. The reversal of 846478889 is 988874648.

846478889 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., 454755625 + 391723264 = 21325^2 + 19792^2 .

It is a cyclic number.

It is not a de Polignac number, because 846478889 - 2¹² = 846474793 is a prime.

Together with 846478891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (846478189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423239444 + 423239445.

It is an arithmetic number, because the mean of its divisors is an integer number (423239445).

Almost surely, 2^846478889 is an apocalyptic number.

It is an amenable number.

846478889 is a deficient number, since it is larger than the sum of its proper divisors (1).

846478889 is an equidigital number, since it uses as much as digits as its factorization.

846478889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24772608, while the sum is 62.

The square root of 846478889 is about 29094.3102513189. The cubic root of 846478889 is about 945.9584125183.

The spelling of 846478889 in words is "eight hundred forty-six million, four hundred seventy-eight thousand, eight hundred eighty-nine".