1099039 has 4 divisors (see below), whose sum is σ = 1102824. Its totient is φ = 1095256.

The previous prime is 1099031. The next prime is 1099051. The reversal of 1099039 is 9309901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9309901 = 47 ⋅198083.

It is a cyclic number.

It is not a de Polignac number, because 1099039 - 2³ = 1099031 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 1099039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099031) 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, 1417 + ... + 2050.

It is an arithmetic number, because the mean of its divisors is an integer number (275706).

2^1099039 is an apocalyptic number.

1099039 is a deficient number, since it is larger than the sum of its proper divisors (3785).

1099039 is an equidigital number, since it uses as much as digits as its factorization.

1099039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3784.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 1099039 is about 1048.3506092906. The cubic root of 1099039 is about 103.1979415390.

The spelling of 1099039 in words is "one million, ninety-nine thousand, thirty-nine".