5438269721 has 2 divisors, whose sum is σ = 5438269722. Its totient is φ = 5438269720.

The previous prime is 5438269673. The next prime is 5438269801. The reversal of 5438269721 is 1279628345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5290525696 + 147744025 = 72736^2 + 12155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5438269721 is a prime.

It is not a weakly prime, because it can be changed into another prime (5438262721) 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, 2719134860 + 2719134861.

It is an arithmetic number, because the mean of its divisors is an integer number (2719134861).

Almost surely, 2^5438269721 is an apocalyptic number.

It is an amenable number.

5438269721 is a deficient number, since it is larger than the sum of its proper divisors (1).

5438269721 is an equidigital number, since it uses as much as digits as its factorization.

5438269721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 5438269721 is about 73744.6250312523. The cubic root of 5438269721 is about 1758.5453848246.

The spelling of 5438269721 in words is "five billion, four hundred thirty-eight million, two hundred sixty-nine thousand, seven hundred twenty-one".