845308487 has 2 divisors, whose sum is σ = 845308488. Its totient is φ = 845308486.

The previous prime is 845308481. The next prime is 845308507. The reversal of 845308487 is 784803548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845308487 - 2¹⁸ = 845046343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845308481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422654243 + 422654244.

It is an arithmetic number, because the mean of its divisors is an integer number (422654244).

Almost surely, 2^845308487 is an apocalyptic number.

845308487 is a deficient number, since it is larger than the sum of its proper divisors (1).

845308487 is an equidigital number, since it uses as much as digits as its factorization.

845308487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 860160, while the sum is 47.

The square root of 845308487 is about 29074.1893610123. The cubic root of 845308487 is about 945.5222282652.

The spelling of 845308487 in words is "eight hundred forty-five million, three hundred eight thousand, four hundred eighty-seven".