1939196159909 has 2 divisors, whose sum is σ = 1939196159910. Its totient is φ = 1939196159908.

The previous prime is 1939196159903. The next prime is 1939196160017. The reversal of 1939196159909 is 9099516919391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1520227350625 + 418968809284 = 1232975^2 + 647278^2 .

It is an emirp because it is prime and its reverse (9099516919391) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1939196159909 - 2²⁰ = 1939195111333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1939196159903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969598079954 + 969598079955.

It is an arithmetic number, because the mean of its divisors is an integer number (969598079955).

Almost surely, 2^{1939196159909} is an apocalyptic number.

It is an amenable number.

1939196159909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1939196159909 is an equidigital number, since it uses as much as digits as its factorization.

1939196159909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47829690, while the sum is 71.

The spelling of 1939196159909 in words is "one trillion, nine hundred thirty-nine billion, one hundred ninety-six million, one hundred fifty-nine thousand, nine hundred nine".