1111993 has 4 divisors (see below), whose sum is σ = 1133028. Its totient is φ = 1090960.

The previous prime is 1111991. The next prime is 1112003. The reversal of 1111993 is 3991111.

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 685584 + 426409 = 828^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111993 - 2¹ = 1111991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111991) 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 3 ways as a sum of consecutive naturals, for example, 10438 + ... + 10543.

It is an arithmetic number, because the mean of its divisors is an integer number (283257).

2^1111993 is an apocalyptic number.

It is an amenable number.

1111993 is a deficient number, since it is larger than the sum of its proper divisors (21035).

1111993 is an equidigital number, since it uses as much as digits as its factorization.

1111993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21034.

The product of its digits is 243, while the sum is 25.

The square root of 1111993 is about 1054.5107870477. The cubic root of 1111993 is about 103.6018119568.

The spelling of 1111993 in words is "one million, one hundred eleven thousand, nine hundred ninety-three".