99955543 has 4 divisors (see below), whose sum is σ = 99975960. Its totient is φ = 99935128.

The previous prime is 99955519. The next prime is 99955567. The reversal of 99955543 is 34555999.

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

It is an interprime number because it is at equal distance from previous prime (99955519) and next prime (99955567).

It is a cyclic number.

It is not a de Polignac number, because 99955543 - 2¹⁷ = 99824471 is a prime.

It is a super-2 number, since 2×99955543² = 19982221152849698, which contains 22 as substring.

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 (99955573) 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 3 ways as a sum of consecutive naturals, for example, 2013 + ... + 14281.

It is an arithmetic number, because the mean of its divisors is an integer number (24993990).

Almost surely, 2^99955543 is an apocalyptic number.

99955543 is a deficient number, since it is larger than the sum of its proper divisors (20417).

99955543 is a wasteful number, since it uses less digits than its factorization.

99955543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20416.

The product of its digits is 1093500, while the sum is 49.

The square root of 99955543 is about 9997.7769028920. The cubic root of 99955543 is about 464.0900894608.

The spelling of 99955543 in words is "ninety-nine million, nine hundred fifty-five thousand, five hundred forty-three".