684863903 has 2 divisors, whose sum is σ = 684863904. Its totient is φ = 684863902.

The previous prime is 684863899. The next prime is 684863929. The reversal of 684863903 is 309368486.

684863903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684863903 - 2² = 684863899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684863983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342431951 + 342431952.

It is an arithmetic number, because the mean of its divisors is an integer number (342431952).

Almost surely, 2^684863903 is an apocalyptic number.

684863903 is a deficient number, since it is larger than the sum of its proper divisors (1).

684863903 is an equidigital number, since it uses as much as digits as its factorization.

684863903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 746496, while the sum is 47.

The square root of 684863903 is about 26169.9045279114. The cubic root of 684863903 is about 881.4575977026.

The spelling of 684863903 in words is "six hundred eighty-four million, eight hundred sixty-three thousand, nine hundred three".