4644188947 has 2 divisors, whose sum is σ = 4644188948. Its totient is φ = 4644188946.

The previous prime is 4644188873. The next prime is 4644189001. The reversal of 4644188947 is 7498814464.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4644188947 is a prime.

It is not a weakly prime, because it can be changed into another prime (4644188347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322094473 + 2322094474.

It is an arithmetic number, because the mean of its divisors is an integer number (2322094474).

Almost surely, 2^4644188947 is an apocalyptic number.

4644188947 is a deficient number, since it is larger than the sum of its proper divisors (1).

4644188947 is an equidigital number, since it uses as much as digits as its factorization.

4644188947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6193152, while the sum is 55.

The square root of 4644188947 is about 68148.2864568142. The cubic root of 4644188947 is about 1668.4119564912.

The spelling of 4644188947 in words is "four billion, six hundred forty-four million, one hundred eighty-eight thousand, nine hundred forty-seven".