139538730769 has 2 divisors, whose sum is σ = 139538730770. Its totient is φ = 139538730768.

The previous prime is 139538730763. The next prime is 139538730791. The reversal of 139538730769 is 967037835931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88908330625 + 50630400144 = 298175^2 + 225012^2 .

It is a cyclic number.

It is not a de Polignac number, because 139538730769 - 2⁷ = 139538730641 is a prime.

It is a super-2 number, since 2×139538730769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (139538730763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69769365384 + 69769365385.

It is an arithmetic number, because the mean of its divisors is an integer number (69769365385).

Almost surely, 2^139538730769 is an apocalyptic number.

It is an amenable number.

139538730769 is a deficient number, since it is larger than the sum of its proper divisors (1).

139538730769 is an equidigital number, since it uses as much as digits as its factorization.

139538730769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25719120, while the sum is 61.

The spelling of 139538730769 in words is "one hundred thirty-nine billion, five hundred thirty-eight million, seven hundred thirty thousand, seven hundred sixty-nine".