535409 has 4 divisors (see below), whose sum is σ = 611904. Its totient is φ = 458916.

The previous prime is 535399. The next prime is 535481. The reversal of 535409 is 904535.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 904535 = 5 ⋅180907.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-535409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (535489) 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, 38237 + ... + 38250.

It is an arithmetic number, because the mean of its divisors is an integer number (152976).

2⁵³⁵⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

535409 is a deficient number, since it is larger than the sum of its proper divisors (76495).

535409 is an equidigital number, since it uses as much as digits as its factorization.

535409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76494.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 535409 is about 731.7164751459. The cubic root of 535409 is about 81.2010956197.

The spelling of 535409 in words is "five hundred thirty-five thousand, four hundred nine".