1818723 has 4 divisors (see below), whose sum is σ = 2424968. Its totient is φ = 1212480.

The previous prime is 1818721. The next prime is 1818727. The reversal of 1818723 is 3278181.

It is a happy number.

1818723 is nontrivially palindromic in base 9.

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

It is not a de Polignac number, because 1818723 - 2¹ = 1818721 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818721) 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, 303118 + ... + 303123.

It is an arithmetic number, because the mean of its divisors is an integer number (606242).

2^1818723 is an apocalyptic number.

1818723 is a deficient number, since it is larger than the sum of its proper divisors (606245).

1818723 is an equidigital number, since it uses as much as digits as its factorization.

1818723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606244.

The product of its digits is 2688, while the sum is 30.

The square root of 1818723 is about 1348.6003855850. The cubic root of 1818723 is about 122.0643528626.

The spelling of 1818723 in words is "one million, eight hundred eighteen thousand, seven hundred twenty-three".