111389 has 8 divisors (see below), whose sum is σ = 120960.
Its totient is φ = 102256.
The previous prime is 111373. The next prime is 111409. The reversal of 111389 is 983111.
111389 = 122 + 132 + ... + 692.
111389 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.
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 111389 - 24 = 111373 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (23).
It is a Duffinian number.
It is a Curzon number.
It is a plaindrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (117389) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 584 + ... + 750.
It is an arithmetic number, because the mean of its divisors is an integer number (15120).
2111389 is an apocalyptic number.
It is an amenable number.
111389 is a deficient number, since it is larger than the sum of its proper divisors (9571).
111389 is a wasteful number, since it uses less digits than its factorization.
111389 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 219.
The product of its digits is 216, while the sum is 23.
The square root of 111389 is about 333.7499063670.
The cubic root of 111389 is about 48.1150308242.
The spelling of 111389 in words is "one hundred eleven thousand, three hundred eighty-nine".