685187696 has 20 divisors (see below), whose sum is σ = 1333406472. Its totient is φ = 341082816.

The previous prime is 685187693. The next prime is 685187707. The reversal of 685187696 is 696781586.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685187693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90695 + ... + 97958.

Almost surely, 2^685187696 is an apocalyptic number.

It is an amenable number.

685187696 is a deficient number, since it is larger than the sum of its proper divisors (648218776).

685187696 is a wasteful number, since it uses less digits than its factorization.

685187696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188888 (or 188882 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The square root of 685187696 is about 26176.0901587689. The cubic root of 685187696 is about 881.5964889633.

The spelling of 685187696 in words is "six hundred eighty-five million, one hundred eighty-seven thousand, six hundred ninety-six".