4973128991 has 2 divisors, whose sum is σ = 4973128992. Its totient is φ = 4973128990.

The previous prime is 4973128981. The next prime is 4973128999. The reversal of 4973128991 is 1998213794.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4973128991 - 2¹⁰ = 4973127967 is a prime.

It is a super-2 number, since 2×4973128991² = 49464023922249356162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4973128999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2486564495 + 2486564496.

It is an arithmetic number, because the mean of its divisors is an integer number (2486564496).

Almost surely, 2^4973128991 is an apocalyptic number.

4973128991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4973128991 is an equidigital number, since it uses as much as digits as its factorization.

4973128991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 4973128991 is about 70520.4154199335. The cubic root of 4973128991 is about 1706.9071907857.

The spelling of 4973128991 in words is "four billion, nine hundred seventy-three million, one hundred twenty-eight thousand, nine hundred ninety-one".