2166393 has 8 divisors (see below), whose sum is σ = 3014208. Its totient is φ = 1381424.

The previous prime is 2166319. The next prime is 2166403. The reversal of 2166393 is 3936612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2166393 - 2⁸ = 2166137 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2166393.

It is not an unprimeable number, because it can be changed into a prime (2162393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15630 + ... + 15767.

It is an arithmetic number, because the mean of its divisors is an integer number (376776).

2^2166393 is an apocalyptic number.

2166393 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

2166393 is a deficient number, since it is larger than the sum of its proper divisors (847815).

2166393 is a wasteful number, since it uses less digits than its factorization.

2166393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31423.

The product of its digits is 5832, while the sum is 30.

The square root of 2166393 is about 1471.8671815079. The cubic root of 2166393 is about 129.3934863546.

The spelling of 2166393 in words is "two million, one hundred sixty-six thousand, three hundred ninety-three".