685946956 has 6 divisors (see below), whose sum is σ = 1200407180. Its totient is φ = 342973476.

The previous prime is 685946953. The next prime is 685946971. The reversal of 685946956 is 659649586.

It is a self number, because there is not a number n which added to its sum of digits gives 685946956.

It is not an unprimeable number, because it can be changed into a prime (685946953) 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 as a sum of consecutive naturals, namely, 85743366 + ... + 85743373.

Almost surely, 2^685946956 is an apocalyptic number.

It is an amenable number.

685946956 is a deficient number, since it is larger than the sum of its proper divisors (514460224).

685946956 is a wasteful number, since it uses less digits than its factorization.

685946956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171486743 (or 171486741 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 58.

The square root of 685946956 is about 26190.5890731766. The cubic root of 685946956 is about 881.9220026221.

The spelling of 685946956 in words is "six hundred eighty-five million, nine hundred forty-six thousand, nine hundred fifty-six".