1103999 has 8 divisors (see below), whose sum is σ = 1198512. Its totient is φ = 1010880.

The previous prime is 1103989. The next prime is 1104017. The reversal of 1103999 is 9993011.

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

It is not a de Polignac number, because 1103999 - 2¹⁶ = 1038463 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 (1103989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1859 + ... + 2379.

It is an arithmetic number, because the mean of its divisors is an integer number (149814).

2^1103999 is an apocalyptic number.

1103999 is a deficient number, since it is larger than the sum of its proper divisors (94513).

1103999 is a wasteful number, since it uses less digits than its factorization.

1103999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 1103999 is about 1050.7135670581. The cubic root of 1103999 is about 103.3529538417.

The spelling of 1103999 in words is "one million, one hundred three thousand, nine hundred ninety-nine".