2103989 has 2 divisors, whose sum is σ = 2103990.
Its totient is φ = 2103988.
The previous prime is 2103977. The next prime is 2104013. The reversal of 2103989 is 9893012.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 2007889 + 96100 = 1417^2 + 310^2
It is a cyclic number.
It is not a de Polignac number, because 2103989 - 24 = 2103973 is a prime.
It is a Chen prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (2103919) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051994 + 1051995.
It is an arithmetic number, because the mean of its divisors is an integer number (1051995).
22103989 is an apocalyptic number.
It is an amenable number.
2103989 is a deficient number, since it is larger than the sum of its proper divisors (1).
2103989 is an equidigital number, since it uses as much as digits as its factorization.
2103989 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 3888, while the sum is 32.
The square root of 2103989 is about 1450.5133574014.
The cubic root of 2103989 is about 128.1389482336.
The spelling of 2103989 in words is "two million, one hundred three thousand, nine hundred eighty-nine".