720337649 has 2 divisors, whose sum is σ = 720337650. Its totient is φ = 720337648.

The previous prime is 720337601. The next prime is 720337663. The reversal of 720337649 is 946733027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695904400 + 24433249 = 26380^2 + 4943^2 .

It is a cyclic number.

It is not a de Polignac number, because 720337649 - 2⁸ = 720337393 is a prime.

It is not a weakly prime, because it can be changed into another prime (720330649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360168824 + 360168825.

It is an arithmetic number, because the mean of its divisors is an integer number (360168825).

Almost surely, 2^720337649 is an apocalyptic number.

It is an amenable number.

720337649 is a deficient number, since it is larger than the sum of its proper divisors (1).

720337649 is an equidigital number, since it uses as much as digits as its factorization.

720337649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 41.

The square root of 720337649 is about 26839.1067101720. The cubic root of 720337649 is about 896.4210331411.

The spelling of 720337649 in words is "seven hundred twenty million, three hundred thirty-seven thousand, six hundred forty-nine".