13435409 has 4 divisors (see below), whose sum is σ = 14468916. Its totient is φ = 12401904.

The previous prime is 13435399. The next prime is 13435417. The reversal of 13435409 is 90453431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90453431 = 59 ⋅1533109.

It can be written as a sum of positive squares in 2 ways, for example, as 5856400 + 7579009 = 2420^2 + 2753^2 .

It is a cyclic number.

It is not a de Polignac number, because 13435409 - 2²⁰ = 12386833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13435469) 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, 516734 + ... + 516759.

It is an arithmetic number, because the mean of its divisors is an integer number (3617229).

Almost surely, 2^13435409 is an apocalyptic number.

It is an amenable number.

13435409 is a deficient number, since it is larger than the sum of its proper divisors (1033507).

13435409 is a wasteful number, since it uses less digits than its factorization.

13435409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033506.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 13435409 is about 3665.4343535248. The cubic root of 13435409 is about 237.7298030575.

The spelling of 13435409 in words is "thirteen million, four hundred thirty-five thousand, four hundred nine".