853508909 has 8 divisors (see below), whose sum is σ = 971583552. Its totient is φ = 742181440.

The previous prime is 853508897. The next prime is 853508911. The reversal of 853508909 is 909805358.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 853508909 - 2⁴ = 853508893 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 (853508009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1686524 + ... + 1687029.

It is an arithmetic number, because the mean of its divisors is an integer number (121447944).

Almost surely, 2^853508909 is an apocalyptic number.

It is an amenable number.

853508909 is a deficient number, since it is larger than the sum of its proper divisors (118074643).

853508909 is a wasteful number, since it uses less digits than its factorization.

853508909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3373587.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 853508909 is about 29214.8747900791. The cubic root of 853508909 is about 948.5699292272.

The spelling of 853508909 in words is "eight hundred fifty-three million, five hundred eight thousand, nine hundred nine".