103405309 has 16 divisors (see below), whose sum is σ = 125349120. Its totient is φ = 83381760.

The previous prime is 103405307. The next prime is 103405327. The reversal of 103405309 is 903504301.

It is not a de Polignac number, because 103405309 - 2¹ = 103405307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103405307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4557 + ... + 15085.

It is an arithmetic number, because the mean of its divisors is an integer number (7834320).

Almost surely, 2^103405309 is an apocalyptic number.

It is an amenable number.

103405309 is a deficient number, since it is larger than the sum of its proper divisors (21943811).

103405309 is a wasteful number, since it uses less digits than its factorization.

103405309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10620.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 103405309 is about 10168.8401010145. The cubic root of 103405309 is about 469.3688661630.

The spelling of 103405309 in words is "one hundred three million, four hundred five thousand, three hundred nine".