1099813 has 8 divisors (see below), whose sum is σ = 1292256. Its totient is φ = 922800.

The previous prime is 1099807. The next prime is 1099817. The reversal of 1099813 is 3189901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1099813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3703 + ... + 3988.

It is an arithmetic number, because the mean of its divisors is an integer number (161532).

2^1099813 is an apocalyptic number.

1099813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1099813 is a deficient number, since it is larger than the sum of its proper divisors (192443).

1099813 is a wasteful number, since it uses less digits than its factorization.

1099813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7715.

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

The square root of 1099813 is about 1048.7196956289. The cubic root of 1099813 is about 103.2221616268. Note that the first 3 decimals are identical.

It can be divided in two parts, 10998 and 13, that added together give a palindrome (11011).

The spelling of 1099813 in words is "one million, ninety-nine thousand, eight hundred thirteen".