1099663 has 8 divisors (see below), whose sum is σ = 1195520. Its totient is φ = 1007640.

The previous prime is 1099649. The next prime is 1099669. The reversal of 1099663 is 3669901.

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

It is a cyclic number.

It is not a de Polignac number, because 1099663 - 2¹³ = 1091471 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 (1099669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345 + ... + 1522.

It is an arithmetic number, because the mean of its divisors is an integer number (149440).

2^1099663 is an apocalyptic number.

1099663 is a deficient number, since it is larger than the sum of its proper divisors (95857).

1099663 is a wasteful number, since it uses less digits than its factorization.

1099663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 1099663 is about 1048.6481774170. The cubic root of 1099663 is about 103.2174686993.

The spelling of 1099663 in words is "one million, ninety-nine thousand, six hundred sixty-three".