4978889 has 2 divisors, whose sum is σ = 4978890. Its totient is φ = 4978888.

The previous prime is 4978871. The next prime is 4978901. The reversal of 4978889 is 9888794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4338889 + 640000 = 2083^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 4978889 - 2¹² = 4974793 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4978889.

It is not a weakly prime, because it can be changed into another prime (4978829) 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, 2489444 + 2489445.

It is an arithmetic number, because the mean of its divisors is an integer number (2489445).

Almost surely, 2^4978889 is an apocalyptic number.

It is an amenable number.

4978889 is a deficient number, since it is larger than the sum of its proper divisors (1).

4978889 is an equidigital number, since it uses as much as digits as its factorization.

4978889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 53.

The square root of 4978889 is about 2231.3424210551. The cubic root of 4978889 is about 170.7565931485.

The spelling of 4978889 in words is "four million, nine hundred seventy-eight thousand, eight hundred eighty-nine".