2111385689 has 4 divisors (see below), whose sum is σ = 2413012224. Its totient is φ = 1809759156.

The previous prime is 2111385641. The next prime is 2111385707. The reversal of 2111385689 is 9865831112.

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 a de Polignac number, because none of the positive numbers 2^k-2111385689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2111385389) 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 3 ways as a sum of consecutive naturals, for example, 150813257 + ... + 150813270.

It is an arithmetic number, because the mean of its divisors is an integer number (603253056).

Almost surely, 2^2111385689 is an apocalyptic number.

It is an amenable number.

2111385689 is a deficient number, since it is larger than the sum of its proper divisors (301626535).

2111385689 is an equidigital number, since it uses as much as digits as its factorization.

2111385689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301626534.

The product of its digits is 103680, while the sum is 44.

The square root of 2111385689 is about 45949.8170725412. The cubic root of 2111385689 is about 1282.8893245049.

The spelling of 2111385689 in words is "two billion, one hundred eleven million, three hundred eighty-five thousand, six hundred eighty-nine".