2189094787 has 8 divisors (see below), whose sum is σ = 2388844080. Its totient is φ = 1989468960.

The previous prime is 2189094781. The next prime is 2189094829. The reversal of 2189094787 is 7874909812.

It is a happy number.

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 2189094787 - 2³ = 2189094779 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2189094781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8389 + ... + 66697.

It is an arithmetic number, because the mean of its divisors is an integer number (298605510).

Almost surely, 2^2189094787 is an apocalyptic number.

2189094787 is a deficient number, since it is larger than the sum of its proper divisors (199749293).

2189094787 is a wasteful number, since it uses less digits than its factorization.

2189094787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61733.

The product of its (nonzero) digits is 2032128, while the sum is 55.

The square root of 2189094787 is about 46787.7632186024. The cubic root of 2189094787 is about 1298.4389125301.

The spelling of 2189094787 in words is "two billion, one hundred eighty-nine million, ninety-four thousand, seven hundred eighty-seven".