850470509 has 12 divisors (see below), whose sum is σ = 1047519324. Its totient is φ = 686093184.

The previous prime is 850470497. The next prime is 850470541. The reversal of 850470509 is 905074058.

850470509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 451350025 + 399120484 = 21245^2 + 19978^2 .

It is not a de Polignac number, because 850470509 - 2¹² = 850466413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (850470109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509654 + ... + 511319.

It is an arithmetic number, because the mean of its divisors is an integer number (87293277).

Almost surely, 2^850470509 is an apocalyptic number.

It is an amenable number.

850470509 is a deficient number, since it is larger than the sum of its proper divisors (197048815).

850470509 is a wasteful number, since it uses less digits than its factorization.

850470509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021004 (or 1020997 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 850470509 is about 29162.8275206640. The cubic root of 850470509 is about 947.4429885659.

The spelling of 850470509 in words is "eight hundred fifty million, four hundred seventy thousand, five hundred nine".