1813099 has 4 divisors (see below), whose sum is σ = 1818064. Its totient is φ = 1808136.

The previous prime is 1813081. The next prime is 1813121. The reversal of 1813099 is 9903181.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1813099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1813099.

It is not an unprimeable number, because it can be changed into a prime (1813039) 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, 1887 + ... + 2680.

It is an arithmetic number, because the mean of its divisors is an integer number (454516).

2^1813099 is an apocalyptic number.

1813099 is a deficient number, since it is larger than the sum of its proper divisors (4965).

1813099 is an equidigital number, since it uses as much as digits as its factorization.

1813099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4964.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1813099 is about 1346.5136464218. The cubic root of 1813099 is about 121.9384039147.

The spelling of 1813099 in words is "one million, eight hundred thirteen thousand, ninety-nine".