394403803 has 2 divisors, whose sum is σ = 394403804. Its totient is φ = 394403802.

The previous prime is 394403777. The next prime is 394403851. The reversal of 394403803 is 308304493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394403803 - 2⁵ = 394403771 is a prime.

It is not a weakly prime, because it can be changed into another prime (394403903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197201901 + 197201902.

It is an arithmetic number, because the mean of its divisors is an integer number (197201902).

Almost surely, 2^394403803 is an apocalyptic number.

394403803 is a deficient number, since it is larger than the sum of its proper divisors (1).

394403803 is an equidigital number, since it uses as much as digits as its factorization.

394403803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 394403803 is about 19859.6022870550. The cubic root of 394403803 is about 733.3540554521.

The spelling of 394403803 in words is "three hundred ninety-four million, four hundred three thousand, eight hundred three".