724223249 has 2 divisors, whose sum is σ = 724223250. Its totient is φ = 724223248.

The previous prime is 724223231. The next prime is 724223251. The reversal of 724223249 is 942322427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700555024 + 23668225 = 26468^2 + 4865^2 .

It is a cyclic number.

It is not a de Polignac number, because 724223249 - 2¹⁶ = 724157713 is a prime.

Together with 724223251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (724223219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362111624 + 362111625.

It is an arithmetic number, because the mean of its divisors is an integer number (362111625).

Almost surely, 2^724223249 is an apocalyptic number.

It is an amenable number.

724223249 is a deficient number, since it is larger than the sum of its proper divisors (1).

724223249 is an equidigital number, since it uses as much as digits as its factorization.

724223249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 35.

The square root of 724223249 is about 26911.3962662661. The cubic root of 724223249 is about 898.0299496627.

The spelling of 724223249 in words is "seven hundred twenty-four million, two hundred twenty-three thousand, two hundred forty-nine".