2139089 has 4 divisors (see below), whose sum is σ = 2148660. Its totient is φ = 2129520.

The previous prime is 2139047. The next prime is 2139091. The reversal of 2139089 is 9809312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1399489 + 739600 = 1183^2 + 860^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139089 - 2⁸ = 2138833 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2339089) 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, 4442 + ... + 4899.

It is an arithmetic number, because the mean of its divisors is an integer number (537165).

2^2139089 is an apocalyptic number.

It is an amenable number.

2139089 is a deficient number, since it is larger than the sum of its proper divisors (9571).

2139089 is an equidigital number, since it uses as much as digits as its factorization.

2139089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9570.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 2139089 is about 1462.5624772980. The cubic root of 2139089 is about 128.8475855511.

The spelling of 2139089 in words is "two million, one hundred thirty-nine thousand, eighty-nine".