2018723 has 4 divisors (see below), whose sum is σ = 2307120. Its totient is φ = 1730328.

The previous prime is 2018713. The next prime is 2018729. The reversal of 2018723 is 3278102.

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 2018723 - 2¹⁴ = 2002339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2018729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144188 + ... + 144201.

It is an arithmetic number, because the mean of its divisors is an integer number (576780).

2^2018723 is an apocalyptic number.

2018723 is a deficient number, since it is larger than the sum of its proper divisors (288397).

2018723 is an equidigital number, since it uses as much as digits as its factorization.

2018723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288396.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2018723 is about 1420.8177222994. The cubic root of 2018723 is about 126.3840428435.

The spelling of 2018723 in words is "two million, eighteen thousand, seven hundred twenty-three".