4989947 has 2 divisors, whose sum is σ = 4989948. Its totient is φ = 4989946.

The previous prime is 4989937. The next prime is 4989949. The reversal of 4989947 is 7499894.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4989947 - 2¹⁶ = 4924411 is a prime.

Together with 4989949, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4989895 and 4989904.

It is not a weakly prime, because it can be changed into another prime (4989949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494973 + 2494974.

It is an arithmetic number, because the mean of its divisors is an integer number (2494974).

Almost surely, 2^4989947 is an apocalyptic number.

4989947 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989947 is an equidigital number, since it uses as much as digits as its factorization.

4989947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 4989947 is about 2233.8189273081. The cubic root of 4989947 is about 170.8829151872.

The spelling of 4989947 in words is "four million, nine hundred eighty-nine thousand, nine hundred forty-seven".