720738461 has 2 divisors, whose sum is σ = 720738462. Its totient is φ = 720738460.

The previous prime is 720738451. The next prime is 720738493. The reversal of 720738461 is 164837027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541446361 + 179292100 = 23269^2 + 13390^2 .

It is a cyclic number.

It is not a de Polignac number, because 720738461 - 2¹⁴ = 720722077 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 (720738451) 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, 360369230 + 360369231.

It is an arithmetic number, because the mean of its divisors is an integer number (360369231).

Almost surely, 2^720738461 is an apocalyptic number.

It is an amenable number.

720738461 is a deficient number, since it is larger than the sum of its proper divisors (1).

720738461 is an equidigital number, since it uses as much as digits as its factorization.

720738461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 720738461 is about 26846.5726117879. The cubic root of 720738461 is about 896.5872652259.

The spelling of 720738461 in words is "seven hundred twenty million, seven hundred thirty-eight thousand, four hundred sixty-one".