47440109 has 4 divisors (see below), whose sum is σ = 47454204. Its totient is φ = 47426016.

The previous prime is 47440103. The next prime is 47440111. The reversal of 47440109 is 90104474.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 90104474 = 2 ⋅45052237.

It can be written as a sum of positive squares in 2 ways, for example, as 43428100 + 4012009 = 6590^2 + 2003^2 .

It is a cyclic number.

It is not a de Polignac number, because 47440109 - 2¹² = 47436013 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 (47440103) 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, 1289 + ... + 9825.

It is an arithmetic number, because the mean of its divisors is an integer number (11863551).

Almost surely, 2^47440109 is an apocalyptic number.

It is an amenable number.

47440109 is a deficient number, since it is larger than the sum of its proper divisors (14095).

47440109 is an equidigital number, since it uses as much as digits as its factorization.

47440109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14094.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 47440109 is about 6887.6780557747. The cubic root of 47440109 is about 362.0055476699.

The spelling of 47440109 in words is "forty-seven million, four hundred forty thousand, one hundred nine".