724849421 has 2 divisors, whose sum is σ = 724849422. Its totient is φ = 724849420.

The previous prime is 724849357. The next prime is 724849441. The reversal of 724849421 is 124948427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620707396 + 104142025 = 24914^2 + 10205^2 .

It is a cyclic number.

It is not a de Polignac number, because 724849421 - 2⁶ = 724849357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (724849441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362424710 + 362424711.

It is an arithmetic number, because the mean of its divisors is an integer number (362424711).

Almost surely, 2^724849421 is an apocalyptic number.

It is an amenable number.

724849421 is a deficient number, since it is larger than the sum of its proper divisors (1).

724849421 is an equidigital number, since it uses as much as digits as its factorization.

724849421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 724849421 is about 26923.0277086363. The cubic root of 724849421 is about 898.2886908842.

The spelling of 724849421 in words is "seven hundred twenty-four million, eight hundred forty-nine thousand, four hundred twenty-one".