720764089 has 2 divisors, whose sum is σ = 720764090. Its totient is φ = 720764088.

The previous prime is 720764081. The next prime is 720764111. The reversal of 720764089 is 980467027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 609250489 + 111513600 = 24683^2 + 10560^2 .

It is a cyclic number.

It is not a de Polignac number, because 720764089 - 2³ = 720764081 is a prime.

It is not a weakly prime, because it can be changed into another prime (720764081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360382044 + 360382045.

It is an arithmetic number, because the mean of its divisors is an integer number (360382045).

Almost surely, 2^720764089 is an apocalyptic number.

It is an amenable number.

720764089 is a deficient number, since it is larger than the sum of its proper divisors (1).

720764089 is an equidigital number, since it uses as much as digits as its factorization.

720764089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 43.

The square root of 720764089 is about 26847.0499124205. The cubic root of 720764089 is about 896.5978920424.

The spelling of 720764089 in words is "seven hundred twenty million, seven hundred sixty-four thousand, eighty-nine".