720347773 has 2 divisors, whose sum is σ = 720347774. Its totient is φ = 720347772.

The previous prime is 720347759. The next prime is 720347813. The reversal of 720347773 is 377743027.

It is an a-pointer prime, because the next prime (720347813) can be obtained adding 720347773 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549339844 + 171007929 = 23438^2 + 13077^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720347773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720347723) 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, 360173886 + 360173887.

It is an arithmetic number, because the mean of its divisors is an integer number (360173887).

Almost surely, 2^720347773 is an apocalyptic number.

It is an amenable number.

720347773 is a deficient number, since it is larger than the sum of its proper divisors (1).

720347773 is an equidigital number, since it uses as much as digits as its factorization.

720347773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172872, while the sum is 40.

The square root of 720347773 is about 26839.2953148923. The cubic root of 720347773 is about 896.4252327106.

The spelling of 720347773 in words is "seven hundred twenty million, three hundred forty-seven thousand, seven hundred seventy-three".