2818139 has 4 divisors (see below), whose sum is σ = 2864400. Its totient is φ = 2771880.

The previous prime is 2818111. The next prime is 2818147. The reversal of 2818139 is 9318182.

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 2818139 - 2²⁰ = 1769563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2818159) 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, 23039 + ... + 23160.

It is an arithmetic number, because the mean of its divisors is an integer number (716100).

2^2818139 is an apocalyptic number.

2818139 is a deficient number, since it is larger than the sum of its proper divisors (46261).

2818139 is an equidigital number, since it uses as much as digits as its factorization.

2818139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46260.

The product of its digits is 3456, while the sum is 32.

The square root of 2818139 is about 1678.7313662406. The cubic root of 2818139 is about 141.2496791702.

The spelling of 2818139 in words is "two million, eight hundred eighteen thousand, one hundred thirty-nine".