391304063 has 2 divisors, whose sum is σ = 391304064. Its totient is φ = 391304062.

The previous prime is 391304059. The next prime is 391304071. The reversal of 391304063 is 360403193.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 391304063 - 2² = 391304059 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (391304363) 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 as a sum of consecutive naturals, namely, 195652031 + 195652032.

It is an arithmetic number, because the mean of its divisors is an integer number (195652032).

Almost surely, 2^391304063 is an apocalyptic number.

391304063 is a deficient number, since it is larger than the sum of its proper divisors (1).

391304063 is an equidigital number, since it uses as much as digits as its factorization.

391304063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 391304063 is about 19781.4070025365. The cubic root of 391304063 is about 731.4277823467.

The spelling of 391304063 in words is "three hundred ninety-one million, three hundred four thousand, sixty-three".