743995321 has 2 divisors, whose sum is σ = 743995322. Its totient is φ = 743995320.

The previous prime is 743995309. The next prime is 743995333. The reversal of 743995321 is 123599347.

It is a balanced prime because it is at equal distance from previous prime (743995309) and next prime (743995333).

It can be written as a sum of positive squares in only one way, i.e., 743925625 + 69696 = 27275^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 743995321 - 2⁷ = 743995193 is a prime.

It is not a weakly prime, because it can be changed into another prime (743995621) 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, 371997660 + 371997661.

It is an arithmetic number, because the mean of its divisors is an integer number (371997661).

Almost surely, 2^743995321 is an apocalyptic number.

It is an amenable number.

743995321 is a deficient number, since it is larger than the sum of its proper divisors (1).

743995321 is an equidigital number, since it uses as much as digits as its factorization.

743995321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 43.

The square root of 743995321 is about 27276.2776236055. The cubic root of 743995321 is about 906.1290796666.

The spelling of 743995321 in words is "seven hundred forty-three million, nine hundred ninety-five thousand, three hundred twenty-one".