845250689 has 2 divisors, whose sum is σ = 845250690. Its totient is φ = 845250688.

The previous prime is 845250677. The next prime is 845250779. The reversal of 845250689 is 986052548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682254400 + 162996289 = 26120^2 + 12767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845250689 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (845255689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422625344 + 422625345.

It is an arithmetic number, because the mean of its divisors is an integer number (422625345).

Almost surely, 2^845250689 is an apocalyptic number.

It is an amenable number.

845250689 is a deficient number, since it is larger than the sum of its proper divisors (1).

845250689 is an equidigital number, since it uses as much as digits as its factorization.

845250689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 845250689 is about 29073.1953696184. The cubic root of 845250689 is about 945.5006777346.

The spelling of 845250689 in words is "eight hundred forty-five million, two hundred fifty thousand, six hundred eighty-nine".