1118813 has 4 divisors (see below), whose sum is σ = 1128828. Its totient is φ = 1108800.

The previous prime is 1118809. The next prime is 1118827. The reversal of 1118813 is 3188111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3188111 = 499 ⋅6389.

It can be written as a sum of positive squares in 2 ways, for example, as 521284 + 597529 = 722^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 1118813 - 2² = 1118809 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118863) 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, 4838 + ... + 5063.

It is an arithmetic number, because the mean of its divisors is an integer number (282207).

2^1118813 is an apocalyptic number.

It is an amenable number.

1118813 is a deficient number, since it is larger than the sum of its proper divisors (10015).

1118813 is an equidigital number, since it uses as much as digits as its factorization.

1118813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10014.

The product of its digits is 192, while the sum is 23.

The square root of 1118813 is about 1057.7395709720. The cubic root of 1118813 is about 103.8131816252.

The spelling of 1118813 in words is "one million, one hundred eighteen thousand, eight hundred thirteen".