743288321 has 2 divisors, whose sum is σ = 743288322. Its totient is φ = 743288320.

The previous prime is 743288311. The next prime is 743288339. The reversal of 743288321 is 123882347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 527345296 + 215943025 = 22964^2 + 14695^2 .

It is a cyclic number.

It is not a de Polignac number, because 743288321 - 2⁶ = 743288257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (743288311) 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, 371644160 + 371644161.

It is an arithmetic number, because the mean of its divisors is an integer number (371644161).

Almost surely, 2^743288321 is an apocalyptic number.

It is an amenable number.

743288321 is a deficient number, since it is larger than the sum of its proper divisors (1).

743288321 is an equidigital number, since it uses as much as digits as its factorization.

743288321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 38.

The square root of 743288321 is about 27263.3145637136. The cubic root of 743288321 is about 905.8419648267.

The spelling of 743288321 in words is "seven hundred forty-three million, two hundred eighty-eight thousand, three hundred twenty-one".