99985539 has 4 divisors (see below), whose sum is σ = 133314056. Its totient is φ = 66657024.

The previous prime is 99985489. The next prime is 99985547. The reversal of 99985539 is 93558999.

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

It is not a de Polignac number, because 99985539 - 2¹⁷ = 99854467 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16664254 + ... + 16664259.

It is an arithmetic number, because the mean of its divisors is an integer number (33328514).

Almost surely, 2^99985539 is an apocalyptic number.

99985539 is a deficient number, since it is larger than the sum of its proper divisors (33328517).

99985539 is a wasteful number, since it uses less digits than its factorization.

99985539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33328516.

The product of its digits is 3936600, while the sum is 57.

The square root of 99985539 is about 9999.2769238580. The cubic root of 99985539 is about 464.1365082773.

The spelling of 99985539 in words is "ninety-nine million, nine hundred eighty-five thousand, five hundred thirty-nine".