99543863 has 4 divisors (see below), whose sum is σ = 102976440. Its totient is φ = 96111288.

The previous prime is 99543853. The next prime is 99543889. The reversal of 99543863 is 36834599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36834599 = 101 ⋅364699.

It is a cyclic number.

It is not a de Polignac number, because 99543863 - 2⁶ = 99543799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99543853) 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, 1716245 + ... + 1716302.

It is an arithmetic number, because the mean of its divisors is an integer number (25744110).

Almost surely, 2^99543863 is an apocalyptic number.

99543863 is a deficient number, since it is larger than the sum of its proper divisors (3432577).

99543863 is a wasteful number, since it uses less digits than its factorization.

99543863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432576.

The product of its digits is 699840, while the sum is 47.

The square root of 99543863 is about 9977.1670828948. The cubic root of 99543863 is about 463.4520741280.

The spelling of 99543863 in words is "ninety-nine million, five hundred forty-three thousand, eight hundred sixty-three".