2239844947 has 2 divisors, whose sum is σ = 2239844948. Its totient is φ = 2239844946.

The previous prime is 2239844927. The next prime is 2239844951. The reversal of 2239844947 is 7494489322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2239844947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2239844894 and 2239844903.

It is not a weakly prime, because it can be changed into another prime (2239844917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119922473 + 1119922474.

It is an arithmetic number, because the mean of its divisors is an integer number (1119922474).

Almost surely, 2^2239844947 is an apocalyptic number.

2239844947 is a deficient number, since it is larger than the sum of its proper divisors (1).

2239844947 is an equidigital number, since it uses as much as digits as its factorization.

2239844947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 52.

The square root of 2239844947 is about 47327.0001901663. Note that the first 3 decimals coincide. The cubic root of 2239844947 is about 1308.3963335786.

The spelling of 2239844947 in words is "two billion, two hundred thirty-nine million, eight hundred forty-four thousand, nine hundred forty-seven".