47409 has 4 divisors (see below), whose sum is σ = 63216. Its totient is φ = 31604.

The previous prime is 47407. The next prime is 47417. The reversal of 47409 is 90474.

47409 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 47409 - 2¹ = 47407 is a prime.

It is a super-2 number, since 2×47409² = 4495226562, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 47409.

It is not an unprimeable number, because it can be changed into a prime (47407) 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, 7899 + ... + 7904.

It is an arithmetic number, because the mean of its divisors is an integer number (15804).

2⁴⁷⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

47409 is a deficient number, since it is larger than the sum of its proper divisors (15807).

47409 is a wasteful number, since it uses less digits than its factorization.

47409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15806.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 47409 is about 217.7360787743. The cubic root of 47409 is about 36.1926401610.

The spelling of 47409 in words is "forty-seven thousand, four hundred nine".