849395609 has 4 divisors (see below), whose sum is σ = 867467904. Its totient is φ = 831323316.

The previous prime is 849395581. The next prime is 849395671. The reversal of 849395609 is 906593948.

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 849395609 - 2¹⁶ = 849330073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (849395809) 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, 9036077 + ... + 9036170.

It is an arithmetic number, because the mean of its divisors is an integer number (216866976).

Almost surely, 2^849395609 is an apocalyptic number.

It is an amenable number.

849395609 is a deficient number, since it is larger than the sum of its proper divisors (18072295).

849395609 is a wasteful number, since it uses less digits than its factorization.

849395609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18072294.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The square root of 849395609 is about 29144.3924108910. The cubic root of 849395609 is about 947.0436661477.

The spelling of 849395609 in words is "eight hundred forty-nine million, three hundred ninety-five thousand, six hundred nine".