538239779839 has 2 divisors, whose sum is σ = 538239779840. Its totient is φ = 538239779838.

The previous prime is 538239779813. The next prime is 538239779851. The reversal of 538239779839 is 938977932835.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 538239779839 - 2⁵ = 538239779807 is a prime.

It is a super-2 number, since 2×538239779839² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (538239779899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269119889919 + 269119889920.

It is an arithmetic number, because the mean of its divisors is an integer number (269119889920).

Almost surely, 2^538239779839 is an apocalyptic number.

538239779839 is a deficient number, since it is larger than the sum of its proper divisors (1).

538239779839 is an equidigital number, since it uses as much as digits as its factorization.

538239779839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617258880, while the sum is 73.

The spelling of 538239779839 in words is "five hundred thirty-eight billion, two hundred thirty-nine million, seven hundred seventy-nine thousand, eight hundred thirty-nine".