139377173729 has 2 divisors, whose sum is σ = 139377173730. Its totient is φ = 139377173728.

The previous prime is 139377173723. The next prime is 139377173773. The reversal of 139377173729 is 927371773931.

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., 113449733329 + 25927440400 = 336823^2 + 161020^2 .

It is a cyclic number.

It is not a de Polignac number, because 139377173729 - 2¹⁶ = 139377108193 is a prime.

It is not a weakly prime, because it can be changed into another prime (139377173723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69688586864 + 69688586865.

It is an arithmetic number, because the mean of its divisors is an integer number (69688586865).

Almost surely, 2^139377173729 is an apocalyptic number.

It is an amenable number.

139377173729 is a deficient number, since it is larger than the sum of its proper divisors (1).

139377173729 is an equidigital number, since it uses as much as digits as its factorization.

139377173729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10501974, while the sum is 59.

The spelling of 139377173729 in words is "one hundred thirty-nine billion, three hundred seventy-seven million, one hundred seventy-three thousand, seven hundred twenty-nine".