685470133 has 4 divisors (see below), whose sum is σ = 692257068. Its totient is φ = 678683200.

The previous prime is 685470119. The next prime is 685470151. The reversal of 685470133 is 331074586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331074586 = 2 ⋅165537293.

It can be written as a sum of positive squares in 2 ways, for example, as 613949284 + 71520849 = 24778^2 + 8457^2 .

It is a cyclic number.

It is not a de Polignac number, because 685470133 - 2⁵ = 685470101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685470092 and 685470101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685470113) 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, 3393316 + ... + 3393517.

It is an arithmetic number, because the mean of its divisors is an integer number (173064267).

Almost surely, 2^685470133 is an apocalyptic number.

It is an amenable number.

685470133 is a deficient number, since it is larger than the sum of its proper divisors (6786935).

685470133 is a wasteful number, since it uses less digits than its factorization.

685470133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6786934.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 685470133 is about 26181.4845453805. The cubic root of 685470133 is about 881.7176048097.

The spelling of 685470133 in words is "six hundred eighty-five million, four hundred seventy thousand, one hundred thirty-three".