720933863989 has 2 divisors, whose sum is σ = 720933863990. Its totient is φ = 720933863988.

The previous prime is 720933863981. The next prime is 720933864019. The reversal of 720933863989 is 989368339027.

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., 637099294225 + 83834569764 = 798185^2 + 289542^2 .

It is a cyclic number.

It is not a de Polignac number, because 720933863989 - 2³ = 720933863981 is a prime.

It is a super-2 number, since 2×720933863989² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720933863981) 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, 360466931994 + 360466931995.

It is an arithmetic number, because the mean of its divisors is an integer number (360466931995).

Almost surely, 2^720933863989 is an apocalyptic number.

It is an amenable number.

720933863989 is a deficient number, since it is larger than the sum of its proper divisors (1).

720933863989 is an equidigital number, since it uses as much as digits as its factorization.

720933863989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105815808, while the sum is 67.

The spelling of 720933863989 in words is "seven hundred twenty billion, nine hundred thirty-three million, eight hundred sixty-three thousand, nine hundred eighty-nine".