845289673 has 2 divisors, whose sum is σ = 845289674. Its totient is φ = 845289672.

The previous prime is 845289647. The next prime is 845289737. The reversal of 845289673 is 376982548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 808662969 + 36626704 = 28437^2 + 6052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845289673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 845289673.

It is not a weakly prime, because it can be changed into another prime (845289073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422644836 + 422644837.

It is an arithmetic number, because the mean of its divisors is an integer number (422644837).

Almost surely, 2^845289673 is an apocalyptic number.

It is an amenable number.

845289673 is a deficient number, since it is larger than the sum of its proper divisors (1).

845289673 is an equidigital number, since it uses as much as digits as its factorization.

845289673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 52.

The square root of 845289673 is about 29073.8658076287. The cubic root of 845289673 is about 945.5152133953.

The spelling of 845289673 in words is "eight hundred forty-five million, two hundred eighty-nine thousand, six hundred seventy-three".