103981729 has 4 divisors (see below), whose sum is σ = 106792084. Its totient is φ = 101171376.

The previous prime is 103981727. The next prime is 103981807. The reversal of 103981729 is 927189301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49561600 + 54420129 = 7040^2 + 7377^2 .

It is a cyclic number.

It is not a de Polignac number, because 103981729 - 2¹ = 103981727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103981691 and 103981700.

It is not an unprimeable number, because it can be changed into a prime (103981723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1405122 + ... + 1405195.

It is an arithmetic number, because the mean of its divisors is an integer number (26698021).

Almost surely, 2^103981729 is an apocalyptic number.

It is an amenable number.

103981729 is a deficient number, since it is larger than the sum of its proper divisors (2810355).

103981729 is an equidigital number, since it uses as much as digits as its factorization.

103981729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810354.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 103981729 is about 10197.1431783613. The cubic root of 103981729 is about 470.2393966774.

The spelling of 103981729 in words is "one hundred three million, nine hundred eighty-one thousand, seven hundred twenty-nine".