1943108378129 has 2 divisors, whose sum is σ = 1943108378130. Its totient is φ = 1943108378128.

The previous prime is 1943108378089. The next prime is 1943108378131. The reversal of 1943108378129 is 9218738013491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1820818288129 + 122290090000 = 1349377^2 + 349700^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1943108378129 is a prime.

It is a super-2 number, since 2×1943108378129² (a number of 25 digits) contains 22 as substring.

Together with 1943108378131, 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 (1943108378179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 971554189064 + 971554189065.

It is an arithmetic number, because the mean of its divisors is an integer number (971554189065).

Almost surely, 2^{1943108378129} is an apocalyptic number.

It is an amenable number.

1943108378129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1943108378129 is an equidigital number, since it uses as much as digits as its factorization.

1943108378129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 1943108378129 in words is "one trillion, nine hundred forty-three billion, one hundred eight million, three hundred seventy-eight thousand, one hundred twenty-nine".