1111663 has 10 divisors (see below), whose sum is σ = 1299664. Its totient is φ = 950796.

The previous prime is 1111661. The next prime is 1111667. The reversal of 1111663 is 3661111.

It is not a de Polignac number, because 1111663 - 2¹ = 1111661 is a prime.

It is an Ulam 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 1111663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2170 + ... + 2632.

2^1111663 is an apocalyptic number.

1111663 is a deficient number, since it is larger than the sum of its proper divisors (188001).

1111663 is an frugal number, since it uses more digits than its factorization.

1111663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 470 counting only the distinct ones).

The product of its digits is 108, while the sum is 19.

The square root of 1111663 is about 1054.3543047762. The cubic root of 1111663 is about 103.5915624976.

Adding to 1111663 its reverse (3661111), we get a palindrome (4772774).

The spelling of 1111663 in words is "one million, one hundred eleven thousand, six hundred sixty-three".