685748803 has 2 divisors, whose sum is σ = 685748804. Its totient is φ = 685748802.

The previous prime is 685748773. The next prime is 685748857. The reversal of 685748803 is 308847586.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685748803 is a prime.

It is not a weakly prime, because it can be changed into another prime (685743803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342874401 + 342874402.

It is an arithmetic number, because the mean of its divisors is an integer number (342874402).

Almost surely, 2^685748803 is an apocalyptic number.

685748803 is a deficient number, since it is larger than the sum of its proper divisors (1).

685748803 is an equidigital number, since it uses as much as digits as its factorization.

685748803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The square root of 685748803 is about 26186.8058953359. The cubic root of 685748803 is about 881.8370726727.

It can be divided in two parts, 68574 and 8803, that added together give a palindrome (77377).

The spelling of 685748803 in words is "six hundred eighty-five million, seven hundred forty-eight thousand, eight hundred three".