720682993 has 2 divisors, whose sum is σ = 720682994. Its totient is φ = 720682992.

The previous prime is 720682987. The next prime is 720682999. The reversal of 720682993 is 399286027.

It is a balanced prime because it is at equal distance from previous prime (720682987) and next prime (720682999).

It can be written as a sum of positive squares in only one way, i.e., 716472289 + 4210704 = 26767^2 + 2052^2 .

It is a cyclic number.

It is not a de Polignac number, because 720682993 - 2⁹ = 720682481 is a prime.

It is not a weakly prime, because it can be changed into another prime (720682999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360341496 + 360341497.

It is an arithmetic number, because the mean of its divisors is an integer number (360341497).

Almost surely, 2^720682993 is an apocalyptic number.

It is an amenable number.

720682993 is a deficient number, since it is larger than the sum of its proper divisors (1).

720682993 is an equidigital number, since it uses as much as digits as its factorization.

720682993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 720682993 is about 26845.5395363923. The cubic root of 720682993 is about 896.5642641971.

The spelling of 720682993 in words is "seven hundred twenty million, six hundred eighty-two thousand, nine hundred ninety-three".