1982975342729 has 2 divisors, whose sum is σ = 1982975342730. Its totient is φ = 1982975342728.

The previous prime is 1982975342653. The next prime is 1982975342731. The reversal of 1982975342729 is 9272435792891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1778883727504 + 204091615225 = 1333748^2 + 451765^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1982975342729 is a prime.

Together with 1982975342731, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1982975342429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991487671364 + 991487671365.

It is an arithmetic number, because the mean of its divisors is an integer number (991487671365).

Almost surely, 2^{1982975342729} is an apocalyptic number.

It is an amenable number.

1982975342729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982975342729 is an equidigital number, since it uses as much as digits as its factorization.

1982975342729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 68.

The spelling of 1982975342729 in words is "one trillion, nine hundred eighty-two billion, nine hundred seventy-five million, three hundred forty-two thousand, seven hundred twenty-nine".