2191046923 has 8 divisors (see below), whose sum is σ = 2435705216. Its totient is φ = 1957262400.

The previous prime is 2191046917. The next prime is 2191046933. The reversal of 2191046923 is 3296401912.

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 2191046923 - 2²¹ = 2188949771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2191046933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2718018 + ... + 2718823.

It is an arithmetic number, because the mean of its divisors is an integer number (304463152).

Almost surely, 2^2191046923 is an apocalyptic number.

2191046923 is a deficient number, since it is larger than the sum of its proper divisors (244658293).

2191046923 is a wasteful number, since it uses less digits than its factorization.

2191046923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5436885.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 2191046923 is about 46808.6201783389. The cubic root of 2191046923 is about 1298.8247609457.

The spelling of 2191046923 in words is "two billion, one hundred ninety-one million, forty-six thousand, nine hundred twenty-three".