47284109 has 4 divisors (see below), whose sum is σ = 48176316. Its totient is φ = 46391904.

The previous prime is 47284099. The next prime is 47284121. The reversal of 47284109 is 90148274.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28922884 + 18361225 = 5378^2 + 4285^2 .

It is a cyclic number.

It is not a de Polignac number, because 47284109 - 2⁴ = 47284093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47284169) 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, 446024 + ... + 446129.

It is an arithmetic number, because the mean of its divisors is an integer number (12044079).

Almost surely, 2^47284109 is an apocalyptic number.

It is an amenable number.

47284109 is a deficient number, since it is larger than the sum of its proper divisors (892207).

47284109 is an equidigital number, since it uses as much as digits as its factorization.

47284109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892206.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 47284109 is about 6876.3441595080. The cubic root of 47284109 is about 361.6083108104.

The spelling of 47284109 in words is "forty-seven million, two hundred eighty-four thousand, one hundred nine".