1917381003793 has 4 divisors (see below), whose sum is σ = 1921748614720. Its totient is φ = 1913013392868.

The previous prime is 1917381003757. The next prime is 1917381003827. The reversal of 1917381003793 is 3973001837191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1917381003793 - 2¹⁷ = 1917380872721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1917381003793.

It is not an unprimeable number, because it can be changed into a prime (1917381000793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2183804805 + ... + 2183805682.

It is an arithmetic number, because the mean of its divisors is an integer number (480437153680).

Almost surely, 2^{1917381003793} is an apocalyptic number.

It is an amenable number.

1917381003793 is a deficient number, since it is larger than the sum of its proper divisors (4367610927).

1917381003793 is an equidigital number, since it uses as much as digits as its factorization.

1917381003793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367610926.

The product of its (nonzero) digits is 857304, while the sum is 52.

The spelling of 1917381003793 in words is "one trillion, nine hundred seventeen billion, three hundred eighty-one million, three thousand, seven hundred ninety-three".