720489293 has 2 divisors, whose sum is σ = 720489294. Its totient is φ = 720489292.

The previous prime is 720489281. The next prime is 720489299. The reversal of 720489293 is 392984027.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 533702404 + 186786889 = 23102^2 + 13667^2 .

It is a cyclic number.

It is not a de Polignac number, because 720489293 - 2⁴ = 720489277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (720489299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360244646 + 360244647.

It is an arithmetic number, because the mean of its divisors is an integer number (360244647).

Almost surely, 2^720489293 is an apocalyptic number.

It is an amenable number.

720489293 is a deficient number, since it is larger than the sum of its proper divisors (1).

720489293 is an equidigital number, since it uses as much as digits as its factorization.

720489293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 720489293 is about 26841.9316182722. The cubic root of 720489293 is about 896.4839329647.

The spelling of 720489293 in words is "seven hundred twenty million, four hundred eighty-nine thousand, two hundred ninety-three".