103685409 has 6 divisors (see below), whose sum is σ = 149767826. Its totient is φ = 69123600.

The previous prime is 103685401. The next prime is 103685423. The reversal of 103685409 is 904586301.

103685409 is a `hidden beast` number, since 103 + 6 + 8 + 540 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 86545809 + 17139600 = 9303^2 + 4140^2 .

It is not a de Polignac number, because 103685409 - 2³ = 103685401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (103685401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5760292 + ... + 5760309.

Almost surely, 2^103685409 is an apocalyptic number.

It is an amenable number.

103685409 is a deficient number, since it is larger than the sum of its proper divisors (46082417).

103685409 is a wasteful number, since it uses less digits than its factorization.

103685409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11520607 (or 11520604 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 103685409 is about 10182.6032526069. The cubic root of 103685409 is about 469.7922863657.

The spelling of 103685409 in words is "one hundred three million, six hundred eighty-five thousand, four hundred nine".