685125837 has 48 divisors (see below), whose sum is σ = 1141842240. Its totient is φ = 405488160.

The previous prime is 685125811. The next prime is 685125869. The reversal of 685125837 is 738521586.

685125837 is a `hidden beast` number, since 68 + 5 + 1 + 2 + 583 + 7 = 666.

It is not a de Polignac number, because 685125837 - 2⁶ = 685125773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685125792 and 685125801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685125037) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138043 + ... + 142919.

It is an arithmetic number, because the mean of its divisors is an integer number (23788380).

Almost surely, 2^685125837 is an apocalyptic number.

It is an amenable number.

685125837 is a deficient number, since it is larger than the sum of its proper divisors (456716403).

685125837 is a wasteful number, since it uses less digits than its factorization.

685125837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951 (or 4934 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 685125837 is about 26174.9085385222. The cubic root of 685125837 is about 881.5699578786.

The spelling of 685125837 in words is "six hundred eighty-five million, one hundred twenty-five thousand, eight hundred thirty-seven".