2381091889 has 4 divisors (see below), whose sum is σ = 2597554800. Its totient is φ = 2164628980.

The previous prime is 2381091871. The next prime is 2381091919. The reversal of 2381091889 is 9881901832.

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 2381091889 - 2¹⁹ = 2380567601 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2381091389) 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, 108231439 + ... + 108231460.

It is an arithmetic number, because the mean of its divisors is an integer number (649388700).

Almost surely, 2^2381091889 is an apocalyptic number.

It is an amenable number.

2381091889 is a deficient number, since it is larger than the sum of its proper divisors (216462911).

2381091889 is a wasteful number, since it uses less digits than its factorization.

2381091889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216462910.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 2381091889 is about 48796.4331585824. The cubic root of 2381091889 is about 1335.3405947362.

The spelling of 2381091889 in words is "two billion, three hundred eighty-one million, ninety-one thousand, eight hundred eighty-nine".