685636941 has 12 divisors (see below), whose sum is σ = 1004845856. Its totient is φ = 415537320.

The previous prime is 685636927. The next prime is 685636943. The reversal of 685636941 is 149636586.

It is not a de Polignac number, because 685636941 - 2⁹ = 685636429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685636943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 944041 + ... + 944766.

Almost surely, 2^685636941 is an apocalyptic number.

It is an amenable number.

685636941 is a deficient number, since it is larger than the sum of its proper divisors (319208915).

685636941 is a wasteful number, since it uses less digits than its factorization.

685636941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1888832 (or 1888821 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 685636941 is about 26184.6699616398. The cubic root of 685636941 is about 881.7891205059.

The spelling of 685636941 in words is "six hundred eighty-five million, six hundred thirty-six thousand, nine hundred forty-one".