720868793 has 2 divisors, whose sum is σ = 720868794. Its totient is φ = 720868792.

The previous prime is 720868787. The next prime is 720868807. The reversal of 720868793 is 397868027.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 514745344 + 206123449 = 22688^2 + 14357^2 .

It is a cyclic number.

It is not a de Polignac number, because 720868793 - 2⁴ = 720868777 is a prime.

It is a super-3 number, since 3×720868793³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (720868723) 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, 360434396 + 360434397.

It is an arithmetic number, because the mean of its divisors is an integer number (360434397).

Almost surely, 2^720868793 is an apocalyptic number.

It is an amenable number.

720868793 is a deficient number, since it is larger than the sum of its proper divisors (1).

720868793 is an equidigital number, since it uses as much as digits as its factorization.

720868793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 720868793 is about 26848.9998510187. Note that the first 3 decimals coincide. The cubic root of 720868793 is about 896.6413056187.

The spelling of 720868793 in words is "seven hundred twenty million, eight hundred sixty-eight thousand, seven hundred ninety-three".