845975447 has 2 divisors, whose sum is σ = 845975448. Its totient is φ = 845975446.

The previous prime is 845975401. The next prime is 845975477. The reversal of 845975447 is 744579548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845975447 - 2¹² = 845971351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845975477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422987723 + 422987724.

It is an arithmetic number, because the mean of its divisors is an integer number (422987724).

Almost surely, 2^845975447 is an apocalyptic number.

845975447 is a deficient number, since it is larger than the sum of its proper divisors (1).

845975447 is an equidigital number, since it uses as much as digits as its factorization.

845975447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5644800, while the sum is 53.

The square root of 845975447 is about 29085.6570666712. The cubic root of 845975447 is about 945.7708395633.

The spelling of 845975447 in words is "eight hundred forty-five million, nine hundred seventy-five thousand, four hundred forty-seven".