850394563 has 2 divisors, whose sum is σ = 850394564. Its totient is φ = 850394562.

The previous prime is 850394557. The next prime is 850394581. The reversal of 850394563 is 365493058.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-850394563 is a prime.

It is not a weakly prime, because it can be changed into another prime (850394513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425197281 + 425197282.

It is an arithmetic number, because the mean of its divisors is an integer number (425197282).

Almost surely, 2^850394563 is an apocalyptic number.

850394563 is a deficient number, since it is larger than the sum of its proper divisors (1).

850394563 is an equidigital number, since it uses as much as digits as its factorization.

850394563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 43.

The square root of 850394563 is about 29161.5253887721. The cubic root of 850394563 is about 947.4147858842.

The spelling of 850394563 in words is "eight hundred fifty million, three hundred ninety-four thousand, five hundred sixty-three".