1113689 has 4 divisors (see below), whose sum is σ = 1134756.
Its totient is φ = 1092624.
The previous prime is 1113667. The next prime is 1113701. The reversal of 1113689 is 9863111.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9863111 = 17 ⋅580183.
It can be written as a sum of positive squares in 2 ways, for example, as 267289 + 846400 = 517^2 + 920^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1113689 is a prime.
It is a Duffinian number.
It is a plaindrome in base 10.
It is not an unprimeable number, because it can be changed into a prime (1113089) 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, 10454 + ... + 10559.
It is an arithmetic number, because the mean of its divisors is an integer number (283689).
21113689 is an apocalyptic number.
It is an amenable number.
1113689 is a deficient number, since it is larger than the sum of its proper divisors (21067).
1113689 is an equidigital number, since it uses as much as digits as its factorization.
1113689 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 21066.
The product of its digits is 1296, while the sum is 29.
The square root of 1113689 is about 1055.3146450230.
The cubic root of 1113689 is about 103.6544559989.
The spelling of 1113689 in words is "one million, one hundred thirteen thousand, six hundred eighty-nine".