99555643 has 8 divisors (see below), whose sum is σ = 108740016. Its totient is φ = 90393600.

The previous prime is 99555629. The next prime is 99555671. The reversal of 99555643 is 34655599.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-99555643 is a prime.

It is a super-2 number, since 2×99555643² = 19822652106286898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 99555593 and 99555602.

It is not an unprimeable number, because it can be changed into a prime (99555613) 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 7 ways as a sum of consecutive naturals, for example, 4555 + ... + 14827.

It is an arithmetic number, because the mean of its divisors is an integer number (13592502).

Almost surely, 2^99555643 is an apocalyptic number.

99555643 is a deficient number, since it is larger than the sum of its proper divisors (9184373).

99555643 is a wasteful number, since it uses less digits than its factorization.

99555643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11165.

The product of its digits is 729000, while the sum is 46.

The square root of 99555643 is about 9977.7574133670. The cubic root of 99555643 is about 463.4703550142.

It can be divided in two parts, 995556 and 43, that added together give a palindrome (995599).

The spelling of 99555643 in words is "ninety-nine million, five hundred fifty-five thousand, six hundred forty-three".