725183321 has 2 divisors, whose sum is σ = 725183322. Its totient is φ = 725183320.

The previous prime is 725183299. The next prime is 725183323. The reversal of 725183321 is 123381527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 695904400 + 29278921 = 26380^2 + 5411^2 .

It is an emirp because it is prime and its reverse (123381527) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-725183321 is a prime.

Together with 725183323, 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 (725183323) 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, 362591660 + 362591661.

It is an arithmetic number, because the mean of its divisors is an integer number (362591661).

Almost surely, 2^725183321 is an apocalyptic number.

It is an amenable number.

725183321 is a deficient number, since it is larger than the sum of its proper divisors (1).

725183321 is an equidigital number, since it uses as much as digits as its factorization.

725183321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 725183321 is about 26929.2280060161. The cubic root of 725183321 is about 898.4266011599.

The spelling of 725183321 in words is "seven hundred twenty-five million, one hundred eighty-three thousand, three hundred twenty-one".