850639663 has 2 divisors, whose sum is σ = 850639664. Its totient is φ = 850639662.

The previous prime is 850639627. The next prime is 850639697. The reversal of 850639663 is 366936058.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 850639663 - 2⁹ = 850639151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (850634663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425319831 + 425319832.

It is an arithmetic number, because the mean of its divisors is an integer number (425319832).

Almost surely, 2^850639663 is an apocalyptic number.

850639663 is a deficient number, since it is larger than the sum of its proper divisors (1).

850639663 is an equidigital number, since it uses as much as digits as its factorization.

850639663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 850639663 is about 29165.7275410712. The cubic root of 850639663 is about 947.5057981698.

The spelling of 850639663 in words is "eight hundred fifty million, six hundred thirty-nine thousand, six hundred sixty-three".