733139021 has 2 divisors, whose sum is σ = 733139022. Its totient is φ = 733139020.

The previous prime is 733139003. The next prime is 733139023. The reversal of 733139021 is 120931337.

733139021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529506121 + 203632900 = 23011^2 + 14270^2 .

It is an emirp because it is prime and its reverse (120931337) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-733139021 is a prime.

It is a super-2 number, since 2×733139021² = 1074985648225676882, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 733139023, it forms a pair of twin primes.

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 (733139023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 366569510 + 366569511.

It is an arithmetic number, because the mean of its divisors is an integer number (366569511).

Almost surely, 2^733139021 is an apocalyptic number.

It is an amenable number.

733139021 is a deficient number, since it is larger than the sum of its proper divisors (1).

733139021 is an equidigital number, since it uses as much as digits as its factorization.

733139021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 733139021 is about 27076.5400485365. The cubic root of 733139021 is about 901.7000873598.

The spelling of 733139021 in words is "seven hundred thirty-three million, one hundred thirty-nine thousand, twenty-one".