2193989 has 16 divisors (see below), whose sum is σ = 2648448. Its totient is φ = 1778112.

The previous prime is 2193979. The next prime is 2194013. The reversal of 2193989 is 9893912.

2193989 = T₃₀₂ + T₃₀₃ + ... + T₃₄₃.

It is not a de Polignac number, because 2193989 - 2⁴ = 2193973 is a prime.

It is a Smith number, since the sum of its digits (41) 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 Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11039 + ... + 11235.

It is an arithmetic number, because the mean of its divisors is an integer number (165528).

2^2193989 is an apocalyptic number.

It is an amenable number.

2193989 is a deficient number, since it is larger than the sum of its proper divisors (454459).

2193989 is a wasteful number, since it uses less digits than its factorization.

2193989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284.

The product of its digits is 34992, while the sum is 41.

The square root of 2193989 is about 1481.2120037321. The cubic root of 2193989 is about 129.9405842884.

The spelling of 2193989 in words is "two million, one hundred ninety-three thousand, nine hundred eighty-nine".