2193986 has 16 divisors (see below), whose sum is σ = 3514104. Its totient is φ = 1023744.

The previous prime is 2193979. The next prime is 2194013. The reversal of 2193986 is 6893912.

It can be written as a sum of positive squares in 4 ways, for example, as 2193361 + 625 = 1481^2 + 25^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5696 + ... + 6068.

2^2193986 is an apocalyptic number.

2193986 is a deficient number, since it is larger than the sum of its proper divisors (1320118).

2193986 is a wasteful number, since it uses less digits than its factorization.

2193986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565.

The product of its digits is 23328, while the sum is 38.

The square root of 2193986 is about 1481.2109910475. The cubic root of 2193986 is about 129.9405250626.

The spelling of 2193986 in words is "two million, one hundred ninety-three thousand, nine hundred eighty-six".