2189874065 has 8 divisors (see below), whose sum is σ = 2628161640. Its totient is φ = 1751690752.

The previous prime is 2189874061. The next prime is 2189874077. The reversal of 2189874065 is 5604789812.

It can be written as a sum of positive squares in 4 ways, for example, as 335365969 + 1854508096 = 18313^2 + 43064^2 .

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 2189874065 - 2² = 2189874061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2189874061) 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, 31847 + ... + 73443.

It is an arithmetic number, because the mean of its divisors is an integer number (328520205).

Almost surely, 2^2189874065 is an apocalyptic number.

It is an amenable number.

2189874065 is a deficient number, since it is larger than the sum of its proper divisors (438287575).

2189874065 is a wasteful number, since it uses less digits than its factorization.

2189874065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52131.

The product of its (nonzero) digits is 967680, while the sum is 50.

The square root of 2189874065 is about 46796.0902747227. The cubic root of 2189874065 is about 1298.5929678109.

The spelling of 2189874065 in words is "two billion, one hundred eighty-nine million, eight hundred seventy-four thousand, sixty-five".