1685053873 has 4 divisors (see below), whose sum is σ = 1691050788. Its totient is φ = 1679056960.

The previous prime is 1685053859. The next prime is 1685053891. The reversal of 1685053873 is 3783505861.

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 573698304 + 1111355569 = 23952^2 + 33337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685053873 - 2²⁵ = 1651499441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685053273) 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, 2998036 + ... + 2998597.

It is an arithmetic number, because the mean of its divisors is an integer number (422762697).

Almost surely, 2^1685053873 is an apocalyptic number.

It is an amenable number.

1685053873 is a deficient number, since it is larger than the sum of its proper divisors (5996915).

1685053873 is an equidigital number, since it uses as much as digits as its factorization.

1685053873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5996914.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 1685053873 is about 41049.4077058366. The cubic root of 1685053873 is about 1189.9752538224.

The spelling of 1685053873 in words is "one billion, six hundred eighty-five million, fifty-three thousand, eight hundred seventy-three".