853146509 has 4 divisors (see below), whose sum is σ = 856808316. Its totient is φ = 849484704.

The previous prime is 853146467. The next prime is 853146533. The reversal of 853146509 is 905641358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 461304484 + 391842025 = 21478^2 + 19795^2 .

It is a cyclic number.

It is not a de Polignac number, because 853146509 - 2⁸ = 853146253 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 (853146809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1830554 + ... + 1831019.

It is an arithmetic number, because the mean of its divisors is an integer number (214202079).

Almost surely, 2^853146509 is an apocalyptic number.

It is an amenable number.

853146509 is a deficient number, since it is larger than the sum of its proper divisors (3661807).

853146509 is a wasteful number, since it uses less digits than its factorization.

853146509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3661806.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 853146509 is about 29208.6718116384. The cubic root of 853146509 is about 948.4356559139.

The spelling of 853146509 in words is "eight hundred fifty-three million, one hundred forty-six thousand, five hundred nine".