724752389 has 2 divisors, whose sum is σ = 724752390. Its totient is φ = 724752388.

The previous prime is 724752383. The next prime is 724752403. The reversal of 724752389 is 983257427.

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., 413512225 + 311240164 = 20335^2 + 17642^2 .

It is an emirp because it is prime and its reverse (983257427) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-724752389 is a prime.

It is a super-2 number, since 2×724752389² = 1050532050722414642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724752383) 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, 362376194 + 362376195.

It is an arithmetic number, because the mean of its divisors is an integer number (362376195).

Almost surely, 2^724752389 is an apocalyptic number.

It is an amenable number.

724752389 is a deficient number, since it is larger than the sum of its proper divisors (1).

724752389 is an equidigital number, since it uses as much as digits as its factorization.

724752389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The square root of 724752389 is about 26921.2256221740. The cubic root of 724752389 is about 898.2486059437.

The spelling of 724752389 in words is "seven hundred twenty-four million, seven hundred fifty-two thousand, three hundred eighty-nine".