685743803 has 2 divisors, whose sum is σ = 685743804. Its totient is φ = 685743802.

The previous prime is 685743767. The next prime is 685743811. The reversal of 685743803 is 308347586.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 685743803 - 2⁸ = 685743547 is a prime.

It is not a weakly prime, because it can be changed into another prime (685743893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342871901 + 342871902.

It is an arithmetic number, because the mean of its divisors is an integer number (342871902).

Almost surely, 2^685743803 is an apocalyptic number.

685743803 is a deficient number, since it is larger than the sum of its proper divisors (1).

685743803 is an equidigital number, since it uses as much as digits as its factorization.

685743803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 44.

The square root of 685743803 is about 26186.7104272377. The cubic root of 685743803 is about 881.8349294213.

The spelling of 685743803 in words is "six hundred eighty-five million, seven hundred forty-three thousand, eight hundred three".