2289909609 has 45 divisors (see below), whose sum is σ = 3713181813. Its totient is φ = 1405729728.

The previous prime is 2289909599. The next prime is 2289909731. The reversal of 2289909609 is 9069099822.

The square root of 2289909609 is 47853.

It is a perfect power (a square), and thus also a powerful number.

2289909609 is a `hidden beast` number, since 2 + 28 + 9 + 9 + 0 + 9 + 609 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 21483225 + 2268426384 = 4635^2 + 47628^2 .

It is not a de Polignac number, because 2289909609 - 2⁷ = 2289909481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2289901609) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 5598597 + ... + 5599005.

Almost surely, 2^2289909609 is an apocalyptic number.

2289909609 is the 47853-rd square number.

2289909609 is the 23927-th centered octagonal number.

It is an amenable number.

2289909609 is a deficient number, since it is larger than the sum of its proper divisors (1423272204).

2289909609 is an frugal number, since it uses more digits than its factorization.

2289909609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 425 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The cubic root of 2289909609 is about 1318.0729473849.

The spelling of 2289909609 in words is "two billion, two hundred eighty-nine million, nine hundred nine thousand, six hundred nine".