849470209 has 4 divisors (see below), whose sum is σ = 970823104. Its totient is φ = 728117316.

The previous prime is 849470207. The next prime is 849470213. The reversal of 849470209 is 902074948.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 849470209 - 2¹ = 849470207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849470207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60676437 + ... + 60676450.

It is an arithmetic number, because the mean of its divisors is an integer number (242705776).

Almost surely, 2^849470209 is an apocalyptic number.

It is an amenable number.

849470209 is a deficient number, since it is larger than the sum of its proper divisors (121352895).

849470209 is a wasteful number, since it uses less digits than its factorization.

849470209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121352894.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 849470209 is about 29145.6722173293. The cubic root of 849470209 is about 947.0713907198.

The spelling of 849470209 in words is "eight hundred forty-nine million, four hundred seventy thousand, two hundred nine".