2168539 has 4 divisors (see below), whose sum is σ = 2184280. Its totient is φ = 2152800.

The previous prime is 2168521. The next prime is 2168549. The reversal of 2168539 is 9358612.

2168539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2168539 - 2²¹ = 71387 is a prime.

It is a super-2 number, since 2×2168539² = 9405122789042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168519) 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 3 ways as a sum of consecutive naturals, for example, 7662 + ... + 7939.

It is an arithmetic number, because the mean of its divisors is an integer number (546070).

2^2168539 is an apocalyptic number.

2168539 is a deficient number, since it is larger than the sum of its proper divisors (15741).

2168539 is a wasteful number, since it uses less digits than its factorization.

2168539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15740.

The product of its digits is 12960, while the sum is 34.

The square root of 2168539 is about 1472.5960070569. The cubic root of 2168539 is about 129.4361974084.

The spelling of 2168539 in words is "two million, one hundred sixty-eight thousand, five hundred thirty-nine".