99688543 has 4 divisors (see below), whose sum is σ = 99761200. Its totient is φ = 99615888.

The previous prime is 99688541. The next prime is 99688571. The reversal of 99688543 is 34588699.

It is a happy number.

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 99688543 - 2¹ = 99688541 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 (99688541) 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, 34230 + ... + 37027.

It is an arithmetic number, because the mean of its divisors is an integer number (24940300).

Almost surely, 2^99688543 is an apocalyptic number.

99688543 is a deficient number, since it is larger than the sum of its proper divisors (72657).

99688543 is a wasteful number, since it uses less digits than its factorization.

99688543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72656.

The product of its digits is 1866240, while the sum is 52.

The square root of 99688543 is about 9984.4150053972. The cubic root of 99688543 is about 463.6764970944.

The spelling of 99688543 in words is "ninety-nine million, six hundred eighty-eight thousand, five hundred forty-three".