9985105919 has 2 divisors, whose sum is σ = 9985105920. Its totient is φ = 9985105918.

The previous prime is 9985105909. The next prime is 9985105939. The reversal of 9985105919 is 9195015899.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9985105919 - 2⁴ = 9985105903 is a prime.

It is a super-2 number, since 2×9985105919² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9985105909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4992552959 + 4992552960.

It is an arithmetic number, because the mean of its divisors is an integer number (4992552960).

Almost surely, 2^9985105919 is an apocalyptic number.

9985105919 is a deficient number, since it is larger than the sum of its proper divisors (1).

9985105919 is an equidigital number, since it uses as much as digits as its factorization.

9985105919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1312200, while the sum is 56.

The square root of 9985105919 is about 99925.5018451246. The cubic root of 9985105919 is about 2153.3645477370.

The spelling of 9985105919 in words is "nine billion, nine hundred eighty-five million, one hundred five thousand, nine hundred nineteen".