2120085689 has 4 divisors (see below), whose sum is σ = 2121050256. Its totient is φ = 2119121124.

The previous prime is 2120085677. The next prime is 2120085707. The reversal of 2120085689 is 9865800212.

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 2120085689 - 2⁸ = 2120085433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2120085619) 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, 478979 + ... + 483384.

It is an arithmetic number, because the mean of its divisors is an integer number (530262564).

Almost surely, 2^2120085689 is an apocalyptic number.

It is an amenable number.

2120085689 is a deficient number, since it is larger than the sum of its proper divisors (964567).

2120085689 is an equidigital number, since it uses as much as digits as its factorization.

2120085689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964566.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 2120085689 is about 46044.3882465605. The cubic root of 2120085689 is about 1284.6489654670.

The spelling of 2120085689 in words is "two billion, one hundred twenty million, eighty-five thousand, six hundred eighty-nine".