1099993 has 4 divisors (see below), whose sum is σ = 1104948. Its totient is φ = 1095040.

The previous prime is 1099961. The next prime is 1099997. The reversal of 1099993 is 3999901.

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

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 700569 = 632^2 + 837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099993 - 2⁵ = 1099961 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099997) 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, 2128 + ... + 2593.

It is an arithmetic number, because the mean of its divisors is an integer number (276237).

2^1099993 is an apocalyptic number.

It is an amenable number.

1099993 is a deficient number, since it is larger than the sum of its proper divisors (4955).

1099993 is an equidigital number, since it uses as much as digits as its factorization.

1099993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4954.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 1099993 is about 1048.8055110458. The cubic root of 1099993 is about 103.2277925767.

The spelling of 1099993 in words is "one million, ninety-nine thousand, nine hundred ninety-three".