1538839733 has 2 divisors, whose sum is σ = 1538839734. Its totient is φ = 1538839732.

The previous prime is 1538839723. The next prime is 1538839747. The reversal of 1538839733 is 3379388351.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1456719889 + 82119844 = 38167^2 + 9062^2 .

It is an emirp because it is prime and its reverse (3379388351) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1538839733 is a prime.

It is a super-2 number, since 2×1538839733² = 4736055447719022578, which contains 22 as substring.

It is a Sophie Germain 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 (1538839723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769419866 + 769419867.

It is an arithmetic number, because the mean of its divisors is an integer number (769419867).

Almost surely, 2^1538839733 is an apocalyptic number.

It is an amenable number.

1538839733 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538839733 is an equidigital number, since it uses as much as digits as its factorization.

1538839733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 1538839733 is about 39228.0477847165. The cubic root of 1538839733 is about 1154.5102608163.

The spelling of 1538839733 in words is "one billion, five hundred thirty-eight million, eight hundred thirty-nine thousand, seven hundred thirty-three".