2158663 has 8 divisors (see below), whose sum is σ = 2374848. Its totient is φ = 1949664.

The previous prime is 2158649. The next prime is 2158679. The reversal of 2158663 is 3668512.

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 2158663 - 2⁵ = 2158631 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 1 + 5 + 8³ + 6⁵ + 6⁶ + 3⁸ .

It is a Duffinian number.

2158663 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158603) 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, 1156 + ... + 2377.

It is an arithmetic number, because the mean of its divisors is an integer number (296856).

2^2158663 is an apocalyptic number.

2158663 is a deficient number, since it is larger than the sum of its proper divisors (216185).

2158663 is a wasteful number, since it uses less digits than its factorization.

2158663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3593.

The product of its digits is 8640, while the sum is 31.

The square root of 2158663 is about 1469.2389186242. The cubic root of 2158663 is about 129.2394047935.

The spelling of 2158663 in words is "two million, one hundred fifty-eight thousand, six hundred sixty-three".