139668439847 has 2 divisors, whose sum is σ = 139668439848. Its totient is φ = 139668439846.

The previous prime is 139668439811. The next prime is 139668439853. The reversal of 139668439847 is 748934866931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139668439847 - 2⁶ = 139668439783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139668439447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69834219923 + 69834219924.

It is an arithmetic number, because the mean of its divisors is an integer number (69834219924).

Almost surely, 2^139668439847 is an apocalyptic number.

139668439847 is a deficient number, since it is larger than the sum of its proper divisors (1).

139668439847 is an equidigital number, since it uses as much as digits as its factorization.

139668439847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188116992, while the sum is 68.

The spelling of 139668439847 in words is "one hundred thirty-nine billion, six hundred sixty-eight million, four hundred thirty-nine thousand, eight hundred forty-seven".