919191919103 has 4 divisors (see below), whose sum is σ = 919332324600. Its totient is φ = 919051513608.

The previous prime is 919191919097. The next prime is 919191919193. The reversal of 919191919103 is 301919191919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301919191919 = 89 ⋅3392350471.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-919191919103 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 (919191919193) 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, 70192928 + ... + 70206021.

It is an arithmetic number, because the mean of its divisors is an integer number (229833081150).

Almost surely, 2^919191919103 is an apocalyptic number.

919191919103 is a deficient number, since it is larger than the sum of its proper divisors (140405497).

919191919103 is a wasteful number, since it uses less digits than its factorization.

919191919103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140405496.

The product of its (nonzero) digits is 177147, while the sum is 53.

The spelling of 919191919103 in words is "nine hundred nineteen billion, one hundred ninety-one million, nine hundred nineteen thousand, one hundred three".