47838209 has 4 divisors (see below), whose sum is σ = 47938560. Its totient is φ = 47737860.

The previous prime is 47838199. The next prime is 47838227. The reversal of 47838209 is 90283874.

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 47838209 - 2¹² = 47834113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47838509) 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, 49457 + ... + 50414.

It is an arithmetic number, because the mean of its divisors is an integer number (11984640).

Almost surely, 2^47838209 is an apocalyptic number.

It is an amenable number.

47838209 is a deficient number, since it is larger than the sum of its proper divisors (100351).

47838209 is an equidigital number, since it uses as much as digits as its factorization.

47838209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100350.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 47838209 is about 6916.5171148491. The cubic root of 47838209 is about 363.0153342691.

The spelling of 47838209 in words is "forty-seven million, eight hundred thirty-eight thousand, two hundred nine".