1972901817143 has 2 divisors, whose sum is σ = 1972901817144. Its totient is φ = 1972901817142.

The previous prime is 1972901817049. The next prime is 1972901817151. The reversal of 1972901817143 is 3417181092791.

It is a strong prime.

It is an emirp because it is prime and its reverse (3417181092791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1972901817143 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1972901817163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986450908571 + 986450908572.

It is an arithmetic number, because the mean of its divisors is an integer number (986450908572).

Almost surely, 2^{1972901817143} is an apocalyptic number.

1972901817143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1972901817143 is an equidigital number, since it uses as much as digits as its factorization.

1972901817143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 53.

The spelling of 1972901817143 in words is "one trillion, nine hundred seventy-two billion, nine hundred one million, eight hundred seventeen thousand, one hundred forty-three".