99985519 has 4 divisors (see below), whose sum is σ = 100005696. Its totient is φ = 99965344.

The previous prime is 99985489. The next prime is 99985547. The reversal of 99985519 is 91558999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99985519 - 2¹³ = 99977327 is a prime.

It is a super-2 number, since 2×99985519² = 19994208019398722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99985519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99985549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3042 + ... + 14464.

It is an arithmetic number, because the mean of its divisors is an integer number (25001424).

Almost surely, 2^99985519 is an apocalyptic number.

99985519 is a deficient number, since it is larger than the sum of its proper divisors (20177).

99985519 is a wasteful number, since it uses less digits than its factorization.

99985519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20176.

The product of its digits is 1312200, while the sum is 55.

The square root of 99985519 is about 9999.2759237857. The cubic root of 99985519 is about 464.1364773304.

The spelling of 99985519 in words is "ninety-nine million, nine hundred eighty-five thousand, five hundred nineteen".