721328303 has 2 divisors, whose sum is σ = 721328304. Its totient is φ = 721328302.

The previous prime is 721328297. The next prime is 721328327. The reversal of 721328303 is 303823127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 721328303 - 2⁶ = 721328239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721328383) 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, 360664151 + 360664152.

It is an arithmetic number, because the mean of its divisors is an integer number (360664152).

Almost surely, 2^721328303 is an apocalyptic number.

721328303 is a deficient number, since it is larger than the sum of its proper divisors (1).

721328303 is an equidigital number, since it uses as much as digits as its factorization.

721328303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 721328303 is about 26857.5557897587. Note that the first 3 decimals coincide. The cubic root of 721328303 is about 896.8317832462.

The spelling of 721328303 in words is "seven hundred twenty-one million, three hundred twenty-eight thousand, three hundred three".