1905195849317 has 2 divisors, whose sum is σ = 1905195849318. Its totient is φ = 1905195849316.

The previous prime is 1905195849239. The next prime is 1905195849391. The reversal of 1905195849317 is 7139485915091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1595474660641 + 309721188676 = 1263121^2 + 556526^2 .

It is a cyclic number.

It is not a de Polignac number, because 1905195849317 - 2⁸ = 1905195849061 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1905195849317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1905195849397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 952597924658 + 952597924659.

It is an arithmetic number, because the mean of its divisors is an integer number (952597924659).

Almost surely, 2^{1905195849317} is an apocalyptic number.

It is an amenable number.

1905195849317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1905195849317 is an equidigital number, since it uses as much as digits as its factorization.

1905195849317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 62.

The spelling of 1905195849317 in words is "one trillion, nine hundred five billion, one hundred ninety-five million, eight hundred forty-nine thousand, three hundred seventeen".