853142809 has 4 divisors (see below), whose sum is σ = 853466320. Its totient is φ = 852819300.

The previous prime is 853142791. The next prime is 853142821. The reversal of 853142809 is 908241358.

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 853142809 - 2⁵ = 853142777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853142879) 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 3 ways as a sum of consecutive naturals, for example, 157767 + ... + 163084.

It is an arithmetic number, because the mean of its divisors is an integer number (213366580).

Almost surely, 2^853142809 is an apocalyptic number.

It is an amenable number.

853142809 is a deficient number, since it is larger than the sum of its proper divisors (323511).

853142809 is a wasteful number, since it uses less digits than its factorization.

853142809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323510.

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 853142809 is about 29208.6084742153. The cubic root of 853142809 is about 948.4342848258.

The spelling of 853142809 in words is "eight hundred fifty-three million, one hundred forty-two thousand, eight hundred nine".