1347378001973 has 2 divisors, whose sum is σ = 1347378001974. Its totient is φ = 1347378001972.

The previous prime is 1347378001883. The next prime is 1347378001997. The reversal of 1347378001973 is 3791008737431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1156437842884 + 190940159089 = 1075378^2 + 436967^2 .

It is a cyclic number.

It is not a de Polignac number, because 1347378001973 - 2³⁶ = 1278658525237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1347378006973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 673689000986 + 673689000987.

It is an arithmetic number, because the mean of its divisors is an integer number (673689000987).

Almost surely, 2^{1347378001973} is an apocalyptic number.

It is an amenable number.

1347378001973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1347378001973 is an equidigital number, since it uses as much as digits as its factorization.

1347378001973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2667168, while the sum is 53.

The spelling of 1347378001973 in words is "one trillion, three hundred forty-seven billion, three hundred seventy-eight million, one thousand, nine hundred seventy-three".