2159663 has 8 divisors (see below), whose sum is σ = 2494800. Its totient is φ = 1847680.

The previous prime is 2159639. The next prime is 2159669. The reversal of 2159663 is 3669512.

2159663 = 92² + 93² + ... + 193².

It is a happy number.

2159663 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 a cyclic number.

It is not a de Polignac number, because 2159663 - 2¹⁴ = 2143279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2159669) 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, 5588 + ... + 5961.

It is an arithmetic number, because the mean of its divisors is an integer number (311850).

2^2159663 is an apocalyptic number.

2159663 is a deficient number, since it is larger than the sum of its proper divisors (335137).

2159663 is a wasteful number, since it uses less digits than its factorization.

2159663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11577.

The product of its digits is 9720, while the sum is 32.

The square root of 2159663 is about 1469.5791914694. The cubic root of 2159663 is about 129.2593584181.

The spelling of 2159663 in words is "two million, one hundred fifty-nine thousand, six hundred sixty-three".