1347742886779 has 2 divisors, whose sum is σ = 1347742886780. Its totient is φ = 1347742886778.

The previous prime is 1347742886773. The next prime is 1347742886839. The reversal of 1347742886779 is 9776882477431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1347742886779 - 2⁵ = 1347742886747 is a prime.

It is not a weakly prime, because it can be changed into another prime (1347742886773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673871443389 + 673871443390.

It is an arithmetic number, because the mean of its divisors is an integer number (673871443390).

Almost surely, 2^{1347742886779} is an apocalyptic number.

1347742886779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1347742886779 is an equidigital number, since it uses as much as digits as its factorization.

1347742886779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 796594176, while the sum is 73.

The spelling of 1347742886779 in words is "one trillion, three hundred forty-seven billion, seven hundred forty-two million, eight hundred eighty-six thousand, seven hundred seventy-nine".