2138579 has 4 divisors (see below), whose sum is σ = 2143680. Its totient is φ = 2133480.

The previous prime is 2138569. The next prime is 2138593. The reversal of 2138579 is 9758312.

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 2138579 - 2²⁰ = 1090003 is a prime.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 3⁷ + 8⁵ + 5⁹ + 7⁶ + 9² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2138569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1859 + ... + 2780.

It is an arithmetic number, because the mean of its divisors is an integer number (535920).

2^2138579 is an apocalyptic number.

2138579 is a deficient number, since it is larger than the sum of its proper divisors (5101).

2138579 is an equidigital number, since it uses as much as digits as its factorization.

2138579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100.

The product of its digits is 15120, while the sum is 35.

The square root of 2138579 is about 1462.3881153784. The cubic root of 2138579 is about 128.8373448222.

The spelling of 2138579 in words is "two million, one hundred thirty-eight thousand, five hundred seventy-nine".