139105342122947 has 2 divisors, whose sum is σ = 139105342122948. Its totient is φ = 139105342122946.

The previous prime is 139105342122931. The next prime is 139105342122953. The reversal of 139105342122947 is 749221243501931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139105342122947 - 2⁴ = 139105342122931 is a prime.

It is not a weakly prime, because it can be changed into another prime (139105342121947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69552671061473 + 69552671061474.

It is an arithmetic number, because the mean of its divisors is an integer number (69552671061474).

Almost surely, 2^{139105342122947} is an apocalyptic number.

139105342122947 is a deficient number, since it is larger than the sum of its proper divisors (1).

139105342122947 is an equidigital number, since it uses as much as digits as its factorization.

139105342122947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 139105342122947 in words is "one hundred thirty-nine trillion, one hundred five billion, three hundred forty-two million, one hundred twenty-two thousand, nine hundred forty-seven".