4978911689 has 2 divisors, whose sum is σ = 4978911690. Its totient is φ = 4978911688.

The previous prime is 4978911667. The next prime is 4978911731. The reversal of 4978911689 is 9861198794.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4607694400 + 371217289 = 67880^2 + 19267^2 .

It is a cyclic number.

It is not a de Polignac number, because 4978911689 - 2⁸ = 4978911433 is a prime.

It is not a weakly prime, because it can be changed into another prime (4978911659) 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, 2489455844 + 2489455845.

It is an arithmetic number, because the mean of its divisors is an integer number (2489455845).

Almost surely, 2^4978911689 is an apocalyptic number.

It is an amenable number.

4978911689 is a deficient number, since it is larger than the sum of its proper divisors (1).

4978911689 is an equidigital number, since it uses as much as digits as its factorization.

4978911689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 62.

The square root of 4978911689 is about 70561.4036779315. The cubic root of 4978911689 is about 1707.5685252967.

The spelling of 4978911689 in words is "four billion, nine hundred seventy-eight million, nine hundred eleven thousand, six hundred eighty-nine".