2109448547 has 4 divisors (see below), whose sum is σ = 2117656776. Its totient is φ = 2101240320.

The previous prime is 2109448531. The next prime is 2109448559. The reversal of 2109448547 is 7458449012.

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

It is a cyclic number.

It is not a de Polignac number, because 2109448547 - 2⁴ = 2109448531 is a prime.

It is a super-2 number, since 2×2109448547² = 8899546344880822418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2109448498 and 2109448507.

It is not an unprimeable number, because it can be changed into a prime (2109448507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4103729 + ... + 4104242.

It is an arithmetic number, because the mean of its divisors is an integer number (529414194).

Almost surely, 2^2109448547 is an apocalyptic number.

2109448547 is a deficient number, since it is larger than the sum of its proper divisors (8208229).

2109448547 is an equidigital number, since it uses as much as digits as its factorization.

2109448547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8208228.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 2109448547 is about 45928.7333485260. The cubic root of 2109448547 is about 1282.4968651500.

The spelling of 2109448547 in words is "two billion, one hundred nine million, four hundred forty-eight thousand, five hundred forty-seven".