733333721 has 2 divisors, whose sum is σ = 733333722. Its totient is φ = 733333720.

The previous prime is 733333717. The next prime is 733333723. The reversal of 733333721 is 127333337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 579846400 + 153487321 = 24080^2 + 12389^2 .

It is a cyclic number.

It is not a de Polignac number, because 733333721 - 2² = 733333717 is a prime.

Together with 733333723, 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 (733333723) 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, 366666860 + 366666861.

It is an arithmetic number, because the mean of its divisors is an integer number (366666861).

Almost surely, 2^733333721 is an apocalyptic number.

It is an amenable number.

733333721 is a deficient number, since it is larger than the sum of its proper divisors (1).

733333721 is an equidigital number, since it uses as much as digits as its factorization.

733333721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 32.

The square root of 733333721 is about 27080.1351732225. The cubic root of 733333721 is about 901.7799019029.

The spelling of 733333721 in words is "seven hundred thirty-three million, three hundred thirty-three thousand, seven hundred twenty-one".