1917148379893 has 4 divisors (see below), whose sum is σ = 1917493010368. Its totient is φ = 1916803749420.

The previous prime is 1917148379891. The next prime is 1917148379911. The reversal of 1917148379893 is 3989738417191.

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 1917148379893 - 2¹ = 1917148379891 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1917148379891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172306893 + ... + 172318018.

It is an arithmetic number, because the mean of its divisors is an integer number (479373252592).

Almost surely, 2^{1917148379893} is an apocalyptic number.

It is an amenable number.

1917148379893 is a deficient number, since it is larger than the sum of its proper divisors (344630475).

1917148379893 is an equidigital number, since it uses as much as digits as its factorization.

1917148379893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344630474.

The product of its digits is 82301184, while the sum is 70.

The spelling of 1917148379893 in words is "one trillion, nine hundred seventeen billion, one hundred forty-eight million, three hundred seventy-nine thousand, eight hundred ninety-three".