99995543 has 4 divisors (see below), whose sum is σ = 100436280. Its totient is φ = 99554808.

The previous prime is 99995527. The next prime is 99995549. The reversal of 99995543 is 34559999.

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 99995543 - 2⁴ = 99995527 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99995549) 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 in 3 ways as a sum of consecutive naturals, for example, 220028 + ... + 220481.

It is an arithmetic number, because the mean of its divisors is an integer number (25109070).

Almost surely, 2^99995543 is an apocalyptic number.

99995543 is a deficient number, since it is larger than the sum of its proper divisors (440737).

99995543 is a wasteful number, since it uses less digits than its factorization.

99995543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440736.

The product of its digits is 1968300, while the sum is 53.

The square root of 99995543 is about 9999.7771475168. Note that the first 3 decimals coincide. The cubic root of 99995543 is about 464.1519874050.

The spelling of 99995543 in words is "ninety-nine million, nine hundred ninety-five thousand, five hundred forty-three".