103989005 has 4 divisors (see below), whose sum is σ = 124786812. Its totient is φ = 83191200.

The previous prime is 103989001. The next prime is 103989013. The reversal of 103989005 is 500989301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 500989301 = 107 ⋅4682143.

It can be written as a sum of positive squares in 2 ways, for example, as 51179716 + 52809289 = 7154^2 + 7267^2 .

It is not a de Polignac number, because 103989005 - 2² = 103989001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103989001) 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, 10398896 + ... + 10398905.

It is an arithmetic number, because the mean of its divisors is an integer number (31196703).

Almost surely, 2^103989005 is an apocalyptic number.

It is an amenable number.

103989005 is a deficient number, since it is larger than the sum of its proper divisors (20797807).

103989005 is an equidigital number, since it uses as much as digits as its factorization.

103989005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20797806.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 103989005 is about 10197.4999387105. The cubic root of 103989005 is about 470.2503645723.

The spelling of 103989005 in words is "one hundred three million, nine hundred eighty-nine thousand, five".