139538934877 has 2 divisors, whose sum is σ = 139538934878. Its totient is φ = 139538934876.

The previous prime is 139538934851. The next prime is 139538934901. The reversal of 139538934877 is 778439835931.

139538934877 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., 83432011716 + 56106923161 = 288846^2 + 236869^2 .

It is a cyclic number.

It is not a de Polignac number, because 139538934877 - 2¹⁹ = 139538410589 is a prime.

It is a super-2 number, since 2×139538934877² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139538904877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69769467438 + 69769467439.

It is an arithmetic number, because the mean of its divisors is an integer number (69769467439).

Almost surely, 2^139538934877 is an apocalyptic number.

It is an amenable number.

139538934877 is a deficient number, since it is larger than the sum of its proper divisors (1).

139538934877 is an equidigital number, since it uses as much as digits as its factorization.

139538934877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 137168640, while the sum is 67.

The spelling of 139538934877 in words is "one hundred thirty-nine billion, five hundred thirty-eight million, nine hundred thirty-four thousand, eight hundred seventy-seven".