1973542707791 has 2 divisors, whose sum is σ = 1973542707792. Its totient is φ = 1973542707790.

The previous prime is 1973542707781. The next prime is 1973542707793. The reversal of 1973542707791 is 1977072453791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1973542707791 is a prime.

It is a Sophie Germain prime.

Together with 1973542707793, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973542707793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986771353895 + 986771353896.

It is an arithmetic number, because the mean of its divisors is an integer number (986771353896).

Almost surely, 2^{1973542707791} is an apocalyptic number.

1973542707791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973542707791 is an equidigital number, since it uses as much as digits as its factorization.

1973542707791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23337720, while the sum is 62.

The spelling of 1973542707791 in words is "one trillion, nine hundred seventy-three billion, five hundred forty-two million, seven hundred seven thousand, seven hundred ninety-one".