720281123 has 2 divisors, whose sum is σ = 720281124. Its totient is φ = 720281122.

The previous prime is 720281119. The next prime is 720281131. The reversal of 720281123 is 321182027.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 720281123 - 2² = 720281119 is a prime.

It is a super-2 number, since 2×720281123² = 1037609792300282258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 720281092 and 720281101.

It is not a weakly prime, because it can be changed into another prime (720281113) 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, 360140561 + 360140562.

It is an arithmetic number, because the mean of its divisors is an integer number (360140562).

Almost surely, 2^720281123 is an apocalyptic number.

720281123 is a deficient number, since it is larger than the sum of its proper divisors (1).

720281123 is an equidigital number, since it uses as much as digits as its factorization.

720281123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 720281123 is about 26838.0536365810. The cubic root of 720281123 is about 896.3975846833.

The spelling of 720281123 in words is "seven hundred twenty million, two hundred eighty-one thousand, one hundred twenty-three".