9973889 has 2 divisors, whose sum is σ = 9973890. Its totient is φ = 9973888.

The previous prime is 9973877. The next prime is 9973897. The reversal of 9973889 is 9883799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7333264 + 2640625 = 2708^2 + 1625^2 .

It is an emirp because it is prime and its reverse (9883799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9973889 - 2¹² = 9969793 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 9973889.

It is not a weakly prime, because it can be changed into another prime (9973819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4986944 + 4986945.

It is an arithmetic number, because the mean of its divisors is an integer number (4986945).

Almost surely, 2^9973889 is an apocalyptic number.

It is an amenable number.

9973889 is a deficient number, since it is larger than the sum of its proper divisors (1).

9973889 is an equidigital number, since it uses as much as digits as its factorization.

9973889 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 9973889 is about 3158.1464500558. The cubic root of 9973889 is about 215.2557907454.

The spelling of 9973889 in words is "nine million, nine hundred seventy-three thousand, eight hundred eighty-nine".