720385901 has 2 divisors, whose sum is σ = 720385902. Its totient is φ = 720385900.

The previous prime is 720385889. The next prime is 720385957. The reversal of 720385901 is 109583027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 448168900 + 272217001 = 21170^2 + 16499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720385901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720381901) 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, 360192950 + 360192951.

It is an arithmetic number, because the mean of its divisors is an integer number (360192951).

Almost surely, 2^720385901 is an apocalyptic number.

It is an amenable number.

720385901 is a deficient number, since it is larger than the sum of its proper divisors (1).

720385901 is an equidigital number, since it uses as much as digits as its factorization.

720385901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 720385901 is about 26840.0056073019. The cubic root of 720385901 is about 896.4410483575.

The spelling of 720385901 in words is "seven hundred twenty million, three hundred eighty-five thousand, nine hundred one".