4989847 has 2 divisors, whose sum is σ = 4989848. Its totient is φ = 4989846.

The previous prime is 4989841. The next prime is 4989851. The reversal of 4989847 is 7489894.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4989847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4989847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4989841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494923 + 2494924.

It is an arithmetic number, because the mean of its divisors is an integer number (2494924).

Almost surely, 2^4989847 is an apocalyptic number.

4989847 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989847 is an equidigital number, since it uses as much as digits as its factorization.

4989847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The square root of 4989847 is about 2233.7965440031. The cubic root of 4989847 is about 170.8817736650.

The spelling of 4989847 in words is "four million, nine hundred eighty-nine thousand, eight hundred forty-seven".