4243839947 has 4 divisors (see below), whose sum is σ = 4297559520. Its totient is φ = 4190120376.

The previous prime is 4243839911. The next prime is 4243839959. The reversal of 4243839947 is 7499383424.

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 4243839947 - 2²² = 4239645643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4243839247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26859668 + ... + 26859825.

It is an arithmetic number, because the mean of its divisors is an integer number (1074389880).

Almost surely, 2^4243839947 is an apocalyptic number.

4243839947 is a deficient number, since it is larger than the sum of its proper divisors (53719573).

4243839947 is an equidigital number, since it uses as much as digits as its factorization.

4243839947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53719572.

The product of its digits is 5225472, while the sum is 53.

The square root of 4243839947 is about 65144.7614701290. The cubic root of 4243839947 is about 1619.0229269202.

The spelling of 4243839947 in words is "four billion, two hundred forty-three million, eight hundred thirty-nine thousand, nine hundred forty-seven".