853905819 has 16 divisors (see below), whose sum is σ = 1265675264. Its totient is φ = 508528800.

The previous prime is 853905803. The next prime is 853905827. The reversal of 853905819 is 918509358.

It is not a de Polignac number, because 853905819 - 2⁴ = 853905803 is a prime.

It is a super-2 number, since 2×853905819² = 1458310295444121522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (853905839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351937 + ... + 354354.

It is an arithmetic number, because the mean of its divisors is an integer number (79104704).

Almost surely, 2^853905819 is an apocalyptic number.

853905819 is a deficient number, since it is larger than the sum of its proper divisors (411769445).

853905819 is a wasteful number, since it uses less digits than its factorization.

853905819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706338.

The product of its (nonzero) digits is 388800, while the sum is 48.

The square root of 853905819 is about 29221.6669442385. Note that the first 3 decimals coincide. The cubic root of 853905819 is about 948.7169452847.

The spelling of 853905819 in words is "eight hundred fifty-three million, nine hundred five thousand, eight hundred nineteen".