2189404953 has 12 divisors (see below), whose sum is σ = 3173894308. Its totient is φ = 1454332320.

The previous prime is 2189404951. The next prime is 2189404963. The reversal of 2189404953 is 3594049812.

It can be written as a sum of positive squares in 2 ways, for example, as 684973584 + 1504431369 = 26172^2 + 38787^2 .

It is not a de Polignac number, because 2189404953 - 2¹ = 2189404951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2189404899 and 2189404908.

It is not an unprimeable number, because it can be changed into a prime (2189404951) 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 11 ways as a sum of consecutive naturals, for example, 436618 + ... + 441603.

Almost surely, 2^2189404953 is an apocalyptic number.

It is an amenable number.

2189404953 is a deficient number, since it is larger than the sum of its proper divisors (984489355).

2189404953 is a wasteful number, since it uses less digits than its factorization.

2189404953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878504 (or 878501 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2189404953 is about 46791.0777071869. The cubic root of 2189404953 is about 1298.5002335514.

The spelling of 2189404953 in words is "two billion, one hundred eighty-nine million, four hundred four thousand, nine hundred fifty-three".