9985800029 has 2 divisors, whose sum is σ = 9985800030. Its totient is φ = 9985800028.

The previous prime is 9985799917. The next prime is 9985800043. The reversal of 9985800029 is 9200085899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6917747929 + 3068052100 = 83173^2 + 55390^2 .

It is a cyclic number.

It is not a de Polignac number, because 9985800029 - 2²⁰ = 9984751453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9985800029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9985800049) 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, 4992900014 + 4992900015.

It is an arithmetic number, because the mean of its divisors is an integer number (4992900015).

Almost surely, 2^9985800029 is an apocalyptic number.

It is an amenable number.

9985800029 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985800029 is an equidigital number, since it uses as much as digits as its factorization.

9985800029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 9985800029 is about 99928.9749221916. The cubic root of 9985800029 is about 2153.4144432929.

The spelling of 9985800029 in words is "nine billion, nine hundred eighty-five million, eight hundred thousand, twenty-nine".