2192187689 has 4 divisors (see below), whose sum is σ = 2321139924. Its totient is φ = 2063235456.

The previous prime is 2192187671. The next prime is 2192187709. The reversal of 2192187689 is 9867812912.

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 1402128025 + 790059664 = 37445^2 + 28108^2 .

It is a cyclic number.

It is not a de Polignac number, because 2192187689 - 2²⁰ = 2191139113 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 2192187689.

It is not an unprimeable number, because it can be changed into a prime (2192187619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64476092 + ... + 64476125.

It is an arithmetic number, because the mean of its divisors is an integer number (580284981).

Almost surely, 2^2192187689 is an apocalyptic number.

It is an amenable number.

2192187689 is a deficient number, since it is larger than the sum of its proper divisors (128952235).

2192187689 is a wasteful number, since it uses less digits than its factorization.

2192187689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128952234.

The product of its digits is 870912, while the sum is 53.

The square root of 2192187689 is about 46820.8040191537. The cubic root of 2192187689 is about 1299.0501323645.

The spelling of 2192187689 in words is "two billion, one hundred ninety-two million, one hundred eighty-seven thousand, six hundred eighty-nine".