1113823 has 4 divisors (see below), whose sum is σ = 1179360. Its totient is φ = 1048288.

The previous prime is 1113809. The next prime is 1113859. The reversal of 1113823 is 3283111.

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

It is a de Polignac number, because none of the positive numbers 2^k-1113823 is a prime.

It is an Ulam number.

It is a Duffinian number.

1113823 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1113823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113863) 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, 32743 + ... + 32776.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

2^1113823 is an apocalyptic number.

1113823 is a deficient number, since it is larger than the sum of its proper divisors (65537).

1113823 is an equidigital number, since it uses as much as digits as its factorization.

1113823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65536.

The product of its digits is 144, while the sum is 19.

The square root of 1113823 is about 1055.3781312875. The cubic root of 1113823 is about 103.6586130961.

Adding to 1113823 its reverse (3283111), we get a palindrome (4396934).

It can be divided in two parts, 1113 and 823, that added together give a square (1936 = 44²).

The spelling of 1113823 in words is "one million, one hundred thirteen thousand, eight hundred twenty-three".