2609387189 has 4 divisors (see below), whose sum is σ = 2670070656. Its totient is φ = 2548703724.

The previous prime is 2609387167. The next prime is 2609387227. The reversal of 2609387189 is 9817839062.

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 2609387189 - 2²⁰ = 2608338613 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2609387189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2609387119) 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, 30341669 + ... + 30341754.

It is an arithmetic number, because the mean of its divisors is an integer number (667517664).

Almost surely, 2^2609387189 is an apocalyptic number.

It is an amenable number.

2609387189 is a deficient number, since it is larger than the sum of its proper divisors (60683467).

2609387189 is an equidigital number, since it uses as much as digits as its factorization.

2609387189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60683466.

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 2609387189 is about 51082.1611621905. The cubic root of 2609387189 is about 1376.7217552531.

The spelling of 2609387189 in words is "two billion, six hundred nine million, three hundred eighty-seven thousand, one hundred eighty-nine".