2187089365 has 4 divisors (see below), whose sum is σ = 2624507244. Its totient is φ = 1749671488.

The previous prime is 2187089357. The next prime is 2187089371. The reversal of 2187089365 is 5639807812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 443776356 + 1743313009 = 21066^2 + 41753^2 .

It is a cyclic number.

It is not a de Polignac number, because 2187089365 - 2³ = 2187089357 is a prime.

It is a super-2 number, since 2×2187089365² = 9566719780992206450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218708932 + ... + 218708941.

It is an arithmetic number, because the mean of its divisors is an integer number (656126811).

Almost surely, 2^2187089365 is an apocalyptic number.

It is an amenable number.

2187089365 is a deficient number, since it is larger than the sum of its proper divisors (437417879).

2187089365 is an equidigital number, since it uses as much as digits as its factorization.

2187089365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437417878.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 2187089365 is about 46766.3272558365. The cubic root of 2187089365 is about 1298.0422929581.

The spelling of 2187089365 in words is "two billion, one hundred eighty-seven million, eighty-nine thousand, three hundred sixty-five".