2166493 has 8 divisors (see below), whose sum is σ = 2496512. Its totient is φ = 1841616.

The previous prime is 2166467. The next prime is 2166509. The reversal of 2166493 is 3946612.

2166493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2166493 - 2¹³ = 2158301 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 6⁷ + 6⁷ + 4⁶ + 9 + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166403) 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 7 ways as a sum of consecutive naturals, for example, 330 + ... + 2107.

It is an arithmetic number, because the mean of its divisors is an integer number (312064).

2^2166493 is an apocalyptic number.

It is an amenable number.

2166493 is a deficient number, since it is larger than the sum of its proper divisors (330019).

2166493 is a wasteful number, since it uses less digits than its factorization.

2166493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571.

The product of its digits is 7776, while the sum is 31.

The square root of 2166493 is about 1471.9011515723. The cubic root of 2166493 is about 129.3954772445.

The spelling of 2166493 in words is "two million, one hundred sixty-six thousand, four hundred ninety-three".