4919191091 has 8 divisors (see below), whose sum is σ = 5096098800. Its totient is φ = 4742768800.

The previous prime is 4919191049. The next prime is 4919191133. The reversal of 4919191091 is 1901919194.

It is an interprime number because it is at equal distance from previous prime (4919191049) and next prime (4919191133).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4919191091 - 2¹⁸ = 4918928947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4919191391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100661 + ... + 141318.

It is an arithmetic number, because the mean of its divisors is an integer number (637012350).

Almost surely, 2^4919191091 is an apocalyptic number.

4919191091 is a deficient number, since it is larger than the sum of its proper divisors (176907709).

4919191091 is a wasteful number, since it uses less digits than its factorization.

4919191091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242709.

The product of its (nonzero) digits is 26244, while the sum is 44.

The square root of 4919191091 is about 70136.9452642471. The cubic root of 4919191091 is about 1700.7137822678.

The spelling of 4919191091 in words is "four billion, nine hundred nineteen million, one hundred ninety-one thousand, ninety-one".