2173689 has 48 divisors (see below), whose sum is σ = 3939840. Its totient is φ = 1179360.

The previous prime is 2173679. The next prime is 2173711. The reversal of 2173689 is 9863712.

2173689 = T₇₆ + T₇₇ + ... + T₂₃₇.

2173689 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2173689 - 2²¹ = 76537 is a prime.

It is a Curzon number.

2173689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2173649) 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 47 ways as a sum of consecutive naturals, for example, 40987 + ... + 41039.

It is an arithmetic number, because the mean of its divisors is an integer number (82080).

2^2173689 is an apocalyptic number.

It is an amenable number.

2173689 is a deficient number, since it is larger than the sum of its proper divisors (1766151).

2173689 is a wasteful number, since it uses less digits than its factorization.

2173689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 94 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2173689 is about 1474.3435827513. The cubic root of 2173689 is about 129.5385811513.

The spelling of 2173689 in words is "two million, one hundred seventy-three thousand, six hundred eighty-nine".