1118869 has 2 divisors, whose sum is σ = 1118870.
Its totient is φ = 1118868.
The previous prime is 1118867. The next prime is 1118893. The reversal of 1118869 is 9688111.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 680625 + 438244 = 825^2 + 662^2
It is an emirp because it is prime and its reverse (9688111) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 1118869 - 21 = 1118867 is a prime.
It is a super-2 number, since 2×11188692 = 2503735678322, which contains 22 as substring.
Together with 1118867, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (1118861) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559434 + 559435.
It is an arithmetic number, because the mean of its divisors is an integer number (559435).
21118869 is an apocalyptic number.
It is an amenable number.
1118869 is a deficient number, since it is larger than the sum of its proper divisors (1).
1118869 is an equidigital number, since it uses as much as digits as its factorization.
1118869 is an evil number, because the sum of its binary digits is even.
The product of its digits is 3456, while the sum is 34.
The square root of 1118869 is about 1057.7660421851.
The cubic root of 1118869 is about 103.8149136517.
The spelling of 1118869 in words is "one million, one hundred eighteen thousand, eight hundred sixty-nine".