724243213 has 2 divisors, whose sum is σ = 724243214. Its totient is φ = 724243212.

The previous prime is 724243211. The next prime is 724243271. The reversal of 724243213 is 312342427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 387814249 + 336428964 = 19693^2 + 18342^2 .

It is an emirp because it is prime and its reverse (312342427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 724243213 - 2¹ = 724243211 is a prime.

Together with 724243211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724243211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362121606 + 362121607.

It is an arithmetic number, because the mean of its divisors is an integer number (362121607).

Almost surely, 2^724243213 is an apocalyptic number.

It is an amenable number.

724243213 is a deficient number, since it is larger than the sum of its proper divisors (1).

724243213 is an equidigital number, since it uses as much as digits as its factorization.

724243213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 28.

The square root of 724243213 is about 26911.7671846351. The cubic root of 724243213 is about 898.0382013104.

The spelling of 724243213 in words is "seven hundred twenty-four million, two hundred forty-three thousand, two hundred thirteen".