2138076191 has 4 divisors (see below), whose sum is σ = 2195862072. Its totient is φ = 2080290312.

The previous prime is 2138076181. The next prime is 2138076197. The reversal of 2138076191 is 1916708312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2138076191 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 (2138076197) 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, 28892885 + ... + 28892958.

It is an arithmetic number, because the mean of its divisors is an integer number (548965518).

Almost surely, 2^2138076191 is an apocalyptic number.

2138076191 is a deficient number, since it is larger than the sum of its proper divisors (57785881).

2138076191 is an equidigital number, since it uses as much as digits as its factorization.

2138076191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57785880.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 2138076191 is about 46239.3359705781. The cubic root of 2138076191 is about 1288.2724689359.

The spelling of 2138076191 in words is "two billion, one hundred thirty-eight million, seventy-six thousand, one hundred ninety-one".