139806726947 has 2 divisors, whose sum is σ = 139806726948. Its totient is φ = 139806726946.

The previous prime is 139806726937. The next prime is 139806726959. The reversal of 139806726947 is 749627608931.

It is a weak prime.

It is an emirp because it is prime and its reverse (749627608931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139806726947 - 2⁴ = 139806726931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 139806726947.

It is not a weakly prime, because it can be changed into another prime (139806726907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69903363473 + 69903363474.

It is an arithmetic number, because the mean of its divisors is an integer number (69903363474).

Almost surely, 2^139806726947 is an apocalyptic number.

139806726947 is a deficient number, since it is larger than the sum of its proper divisors (1).

139806726947 is an equidigital number, since it uses as much as digits as its factorization.

139806726947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27433728, while the sum is 62.

The spelling of 139806726947 in words is "one hundred thirty-nine billion, eight hundred six million, seven hundred twenty-six thousand, nine hundred forty-seven".