1803113 has 8 divisors (see below), whose sum is σ = 1979208. Its totient is φ = 1632384.

The previous prime is 1803103. The next prime is 1803127. The reversal of 1803113 is 3113081.

It can be written as a sum of positive squares in 4 ways, for example, as 619369 + 1183744 = 787^2 + 1088^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1803113 - 2⁴ = 1803097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1803091 and 1803100.

It is not an unprimeable number, because it can be changed into a prime (1803103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (247401).

2^1803113 is an apocalyptic number.

1803113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1803113 is a deficient number, since it is larger than the sum of its proper divisors (176095).

1803113 is a wasteful number, since it uses less digits than its factorization.

1803113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1803113 is about 1342.8004319332. The cubic root of 1803113 is about 121.7141250605.

Adding to 1803113 its reverse (3113081), we get a palindrome (4916194).

The spelling of 1803113 in words is "one million, eight hundred three thousand, one hundred thirteen".