685692763 has 4 divisors (see below), whose sum is σ = 783648880. Its totient is φ = 587736648.

The previous prime is 685692743. The next prime is 685692817. The reversal of 685692763 is 367296586.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685692763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 685692763.

It is not an unprimeable number, because it can be changed into a prime (685692713) 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 3 ways as a sum of consecutive naturals, for example, 48978048 + ... + 48978061.

It is an arithmetic number, because the mean of its divisors is an integer number (195912220).

Almost surely, 2^685692763 is an apocalyptic number.

685692763 is a deficient number, since it is larger than the sum of its proper divisors (97956117).

685692763 is an equidigital number, since it uses as much as digits as its factorization.

685692763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97956116.

The product of its digits is 3265920, while the sum is 52.

The square root of 685692763 is about 26185.7358689803. The cubic root of 685692763 is about 881.8130505159.

The spelling of 685692763 in words is "six hundred eighty-five million, six hundred ninety-two thousand, seven hundred sixty-three".