103409 has 2 divisors, whose sum is σ = 103410. Its totient is φ = 103408.

The previous prime is 103399. The next prime is 103421. The reversal of 103409 is 904301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87025 + 16384 = 295^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 103409 - 2⁴ = 103393 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (102409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51704 + 51705.

It is an arithmetic number, because the mean of its divisors is an integer number (51705).

2¹⁰³⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

103409 is a deficient number, since it is larger than the sum of its proper divisors (1).

103409 is an equidigital number, since it uses as much as digits as its factorization.

103409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 103409 is about 321.5726978461. The cubic root of 103409 is about 46.9374450724.

Subtracting from 103409 its product of nonzero digits (108), we obtain a palindrome (103301).

It can be divided in two parts, 103 and 409, that added together give a 9-th power (512 = 2⁹).

The spelling of 103409 in words is "one hundred three thousand, four hundred nine".